Exhibit 4.100

Contract No. 2010014

Yunnan Nujiang Grid Co., Ltd.

and

Fugong County Hengda Hydroelectric
Development Co., Ltd.

Power Purchase and Sale Contract

Buyer:Yunnan Nujiang Grid Co., Ltd.

Seller:Fugong County Hengda Hydroelectric Development Co., Ltd.

Place of Execution:Liuku Town, Lushui County of Nujiang Prefecture

Date of Execution:1 January 2010

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|                                                                                             |  |                                                                 
|-------------------------------------------------------------------------------------------- |  | ----------------------------------------------------------------
|Buyer                                                                                        |  | Seller                                                          
|                                                                                             |  |                                                                 
|Name: Yunnan Nujiang Grid Co., Ltd.                                                          |  | Name: Fugong County Hengda Hydroelectric Development Co., Ltd.  
|                                                                                             |  |                                                                 
|Legal Address: No.127 South Xiangyang Road, Liuku Town, Lushui County
 of Nujiang Prefecture |  | Legal Address: Shangpa Town of Fugong County                    
|                                                                                             |  |                                                                 
|Legal Representative (person in charge): Yang Yong                                           |  | Legal Representative (person in charge): Zhang Zimin            
|                                                                                             |  |                                                                 
|Authorized Representative: Cai Xianglong                                                     |  | Authorized Representative: Huang Guoping                        
|                                                                                             |  |                                                                 
|Tel No.: 0886-3630727                                                                        |  | Tel No.: 0886-3412609                                           
|                                                                                             |  |                                                                 
|Fax No.: 0886-3630727                                                                        |  | Fax No.: 0886-3412609                                           
|                                                                                             |  |                                                                 
|Postal Code: 673100                                                                          |  | Postal Code: 673400                                             
|                                                                                             |  |                                                                 
|Account Bank: Business branch of Agricultural Bank of China, Nujiang
 Prefecture             |  | Account Bank: Fugong County branch of Agricultural Bank of China
|                                                                                             |  |                                                                 
|Account Number: 150101040000816                                                              |  | Account Number: 151101040004205                                 
|                                                                                             |  |                                                                 
|Industrial and Commercial Registration No.: 
 5333001000288                                  |  | Industrial and Commercial Registration No.: 533323100000137     
|                                                                                             |  |                                                                 
|Tax Registration No.: Dian Guo Shui Zi
 5333231709864383                                     |  | Tax Registration No.: Dian Di Shui Zi
 533323781670129          
|                                                                                             |  |                                                                 

2

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To expressly define the rights and obligations under the power sale and
purchase transaction between Yunnan Nujiang Grid Co., Ltd. (hereinafter the Buyer) and Fugong County Hengda
Hydroelectric Development Co., Ltd. (hereinafter the Seller), and in accordance with the
Contract Law of the Peoples Republic of China, the Power Law of the Peoples
Republic of China, the State Electricity Regulatory Commissions Power Purchase
and Sale Contract, Yunnan Province Power Supply and Use Regulations, the
Measures of Yunnan Nujiang Grid Co., Ltd. for the Management of the Connection
of Newly Established Power Plants to the Grid, and other ancillary laws and
regulations, and in consideration of the actual conditions of Yunnan grid and
power market, the Buyer and the Seller have, through consultations, entered
into this Contract.

|    |                                                                                                                                                                                     |                                    |                                                          
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------- | ---------------------------------------------------------
|1   | Power Purchase Principles                                                                                                                                                          
|    |                                                                                                                                                                                    
|1.1 | The Buyer shall purchase the
 on-grid electric power generated by the Seller at the quantity that it is
 able to accept in an overall arrangement in accordance with this Contract.
|    |                                                                                                                                                                                    
|1.2 | The on-grid electric quantity of
 the two stations of the Seller are as follows:                                                                                                   
|    |                                                                                                                                                                                    
|    | (1)                                                                                                                                                                                 | Alu River Hydroelectric Station   
|    |                                                                                                                                                                                     |                                   
|    |                                                                                                                                                                                     | (i)                                | Annual on-grid electric quantity
 of 2010: 24,790,000 KWH
|    |                                                                                                                                                                                     |                                    |                                                          
|    |                                                                                                                                                                                     | (ii)                               | On-grid electric
 quantity plan of each month (KWH)      
|    |                                                                                                                                                                                     |                                    |                                                          
|    |                                                                                                                                                                                     |                                    | January: 1,140,000 KWH                                   
|    |                                                                                                                                                                                     |                                    |                                                          
|    |                                                                                                                                                                                     |                                    | February: 770,000 KWH                                    
|    |                                                                                                                                                                                     |                                    |                                                          
|    |                                                                                                                                                                                     |                                    | March: 1,370,000 KWH                                     
|    |                                                                                                                                                                                     |                                    |                                                          
|    |                                                                                                                                                                                     |                                    | April: 3,020,000 KWH                                     
|    |                                                                                                                                                                                     |                                    |                                                          
|    |                                                                                                                                                                                     |                                    | May: 2,880,000 KWH                                       
|    |                                                                                                                                                                                     |                                    |                                                          
|    |                                                                                                                                                                                     |                                    | June: 2,730,000 KWH                                      
|    |                                                                                                                                                                                     |                                    |                                                          
|    |                                                                                                                                                                                     |                                    | July: 2,890,000 KWH                                      
|    |                                                                                                                                                                                     |                                    |                                                          
|    |                                                                                                                                                                                     |                                    | August: 2,580,000 KWH                                    
|    |                                                                                                                                                                                     |                                    |                                                          
|    |                                                                                                                                                                                     |                                    | September: 2,560,000 KWH                                 
|    |                                                                                                                                                                                     |                                    |                                                          
|    |                                                                                                                                                                                     |                                    | October: 2,520,000 KWH                                   
|    |                                                                                                                                                                                     |                                    |                                                          
|    |                                                                                                                                                                                     |                                    | November: 1,640,000 KWH                                  
|    |                                                                                                                                                                                     |                                    |                                                          
|    |                                                                                                                                                                                     |                                    | December: 710,000 KWH                                    
|    |                                                                                                                                                                                     |                                    |                                                          
|    | (2)                                                                                                                                                                                 | Zileng River Hydroelectric Station
|    |                                                                                                                                                                                     |                                    |                                                          
|    |                                                                                                                                                                                     | (i)                                | Annual on-grid
 electric quantity of 2010: 44,780,000 KWH
|    |                                                                                                                                                                                     |                                    |                                                          
|    |                                                                                                                                                                                     | (ii)                               | On-grid electric
 quantity plan of each month (KWH)      
|    |                                                                                                                                                                                     |                                    |                                                          
|    |                                                                                                                                                                                     |                                    | January: 4,510,000 KWH                                   
|    |                                                                                                                                                                                     |                                    |                                                          
|    |                                                                                                                                                                                     |                                    | February: 2,280,000 KWH                                  
|    |                                                                                                                                                                                     |                                    |                                                          
|    |                                                                                                                                                                                     |                                    | March: 1,230,000 KWH                                     

3

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| |  |  |                         
| |  |  | ------------------------
| |  |  | April: 2,950,000 KWH    
| |  |  |                         
| |  |  | May: 4,750,000 KWH      
| |  |  |                         
| |  |  | June: 4,620,000 KWH     
| |  |  |                         
| |  |  | July: 5,110,000 KWH     
| |  |  |                         
| |  |  | August: 5,290,000 KWH   
| |  |  |                         
| |  |  | September: 5,250,000 KWH
| |  |  |                         
| |  |  | October: 4,490,000 KWH  
| |  |  |                         
| |  |  | November: 2,650,000 KWH 
| |  |  |                         
| |  |  | December: 1,650,000 KWH 

|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|1.3 | Before
 the end of October each year, the Buyer and the Seller (the Parties) shall discuss the on-grid
 electric quantity of the next year, and enter into a Power Purchase and Sale
 Contract of the next year before the end of December.                                                                                                                                                                                                                                                                                                                         
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|2   | Quality of On-grid Electricity                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|   
|2.1 | The
 tolerated range of error of the Sellers voltage of on-grid electricity
 (taken from the metering point): the sum of the absolute positive and
 negative values of the range of error shall not exceed 10% of the specified
 value; the power factor shall be 0.85. A payment for the portion of the
 short-supplied reactive electric quantity shall be calculated at the rate of
 RMB0.02/kVar·h and paid to the Buyer.                                                                                                                                        
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|2.2 | The
 Sellers on-grid electricity shall meet the requirements of the Regulations
 of Yunnan Province for the Administration of Grid Voltage and Reactive
 Electricity, be subject to the unified arrangement and adjustment of reactive
 electricity and voltage stipulated by Nujiang Prefecture, or otherwise the
 Buyer shall have the right not to purchase the on-grid electric quantity from
 the Seller.                                                                                                                                                       
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|3   | Power Measurement                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|3.1 | On-grid
 electric quantity metering points at the Sellers hydroelectric stations                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|    | A set of
 two-directional active and reactive kilowatt-hour meters marked by hour and
 having the remote-transmission function shall be installed in accordance with
 the state standards and the specifications of the power industry in order to
 measure the Sellers on-grid electric quantity by hour, which shall be used
 as basis for the calculation of tariff. (Matters such as the electric
 quantity metering points measuring electric quantity sold by the Seller to
 the Buyer shall be defined in a separately signed power supply and use
 contract.)
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|3.2 | Parameters
 of the major on-grid electric quantity metering points at the Sellers
 hydroelectric stations                                                                                                                                                                                                                                                                                                                                                                                                                                                            

4

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|    |  |                                     |  |                                                      |  |                |  |                             |  |                            |  |                                         
|--- |  | ----------------------------------- |  | ---------------------------------------------------- |  | -------------- |  | --------------------------- |  | -------------------------- |  | ----------------------------------------
|No. |  | Purchasing
 Point                   |  | Metering
 Point                                      |  | Meter No.      |  | Current
 Transducer 
 Ratio |  | Voltage
 Transducer
 Ratio |  | Multiplying
 Factor for the
 Measurement
|    |  |                                     |  |                                                      |  |                |  |                             |  |                            |  |                                         
|    |  |                                     |  |                                                      |  |                |  |                             |  |                            |  |                                         
|1   |  | Alu River Hydroelectric Station     |  | 153 short circuiting devices at Aludi switchstation  |  | 20060556020040 |  | 200/5                       |  | 110000/100                 |  | 44000                                   
|    |  |                                     |  |                                                      |  |                |  |                             |  |                            |  |                                         
|2   |  | Zileng
 River Hydroelectric Station |  | 154 short
 circuiting devices at Yagu switch station |  | 20050623U0016  |  | 300/5                       |  | 110000/100                 |  | 66000                                   

|    |                                                                                                            
|--- | -----------------------------------------------------------------------------------------------------------
|3.3 | Parameters of the back-up on-grid
 electric quantity metering points at the Sellers hydroelectric stations

|    |  |                                     |  |                                                                     |  |             |  |                            |  |                            |  |                                         
|--- |  | ----------------------------------- |  | ------------------------------------------------------------------- |  | ----------- |  | -------------------------- |  | -------------------------- |  | ----------------------------------------
|No. |  | Purchasing
 Point                   |  | Metering
 Point                                                     |  | Meter No.   |  | Current
 Transducer
 Ratio |  | Voltage
 Transducer
 Ratio |  | Multiplying
 Factor for the
 Measurement
|    |  |                                     |  |                                                                     |  |             |  |                            |  |                            |  |                                         
|    |  |                                     |  |                                                                     |  |             |  |                            |  |                            |  |                                         
|1   |  | Alu River
 Hydroelectric Station    |  | 101 short
 circuiting devices at Alu River Hydroelectric Station    |  | SDK8000407  |  | 150/5                      |  | 110000/100                 |  | 33000                                   
|    |  |                                     |  |                                                                     |  |             |  |                            |  |                            |  |                                         
|2   |  | Zileng
 River Hydroelectric Station |  | 151 short
 circuiting devices at Zileng River Hydroelectric Station |  | SJL79000033 |  | 400/5                      |  | 110000/100                 |  | 88000                                   

|    |                                                                                                                                                                                                                                                                                                                                                                                             | 
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | 
|3.4 | If any
 electric quantity measuring device experiences malfunction or breakdown in
 operation, the electric quantity of the period of malfunction or breakdown
 shall be determined by the contralateral electric quantity net the theoretic
 line loss calculating value at the metering points.                                                                                          
|    |                                                                                                                                                                                                                                                                                                                                                                                             | 
|3.5 | The
 readings shown in the electric quantity measuring device shall be checked and
 recorded by the Parties at 10:00 AM on the 25th of each month. The Seller has
 the right to supervise.                                                                                                                                                                                                 
|    |                                                                                                                                                                                                                                                                                                                                                                                             | 
|4   | Tariff                                                                                                                                                                                                                                                                                                                                                                                     
|    |                                                                                                                                                                                                                                                                                                                                                                                             | 
|    | The
 on-grid tariff shall follow the provisions of the Document (Nu Ji Jia Ge
 [2004] No. 444) issued by the Development and Planning Commission of Nujiang
 Lisu Ethnic Autonomous Prefecture, which stipulates:                                                                                                                                                                          
|    |                                                                                                                                                                                                                                                                                                                                                                                             | 
|4.1 | Tariff in
 the dry season (November 1 of each year to April 30 of the next year): RMB
 0.20/KWHh                                                                                                                                                                                                                                                                                           
|    |                                                                                                                                                                                                                                                                                                                                                                                             | 
|4.2 | Tariff in
 the wet season (May 1 of each year to October 31 of the next year): RMB
 0.16/KWH                                                                                                                                                                                                                                                                                               
|    |                                                                                                                                                                                                                                                                                                                                                                                             | 
|4.3 | Tariff
 for silicon smelting: This shall follow the silicon-electricity interaction
 price stipulated (on a yearly basis) by the prefecture government. In the wet
 season (May to October of each year), the tariff is RMB 0.13/KWH; in the dry
 season, it shall be determined by whether the silicon plants continue their
 production or not and the power supply-and-demand situation.
|    |                                                                                                                                                                                                                                                                                                                                                                                             | 
|5   | Tariff Settlement                                                                                                                                                                                                                                                                                                                                                                          
|    |                                                                                                                                                                                                                                                                                                                                                                                             | 
|5.1 | The
 Seller shall submit the on-grid electric quantity, tariff and corresponding
 VAT invoice which are in compliance with this Contract to the Buyer. The
 tariff of each month shall be paid before                                                                                                                                                                                      

5

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|    |                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                       
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------
|    | 25th of
 the next month. If the Seller fails to submit the tariff invoice to the Buyer
 as required, the date of payment of the tariff by the Buyer shall be postponed
 accordingly.                                                                                                                                                                                                   
|    |                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                       
|5.2 | The
 electric quantity supplied by the Buyer to the Seller and the electric
 quantity sold by the Seller to the Buyer must not be mutually set off.                                                                                                                                                                                                                                    
|    |                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                       
|6   | Rights, Obligations and Liability for Breach of Contract                                                                                                                                                                                                                                                                                                                               
|    |                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                       
|6.1 | If the
 Seller fails to supply its scheduled electric quantity as agreed in the
 Contract due to the reasons attributable to the Buyer, the Buyer shall
 endeavour to make it up in the subsequent months of the year. Should it still
 fail to make it up, it shall compensate the Seller for the short-supplied
 electric quantity at the on-grid tariff prescribed in this Contract.
|    |                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                       
|    | In the
 event of any of the following circumstances, the Buyer will not make it up or
 give compensation:                                                                                                                                                                                                                                                                              
|   
|    |                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                       
|    | (1)                                                                                                                                                                                                                                                                                                                                                                                     | where the
 cause of failure to supply its scheduled electric quantity can be attributed
 to the Seller;               
|    |                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                       
|    | (2)                                                                                                                                                                                                                                                                                                                                                                                     | where the
 cause of the failure to supply its scheduled electric quantity can be
 attributed to a force majeure event;
|    |                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                       
|    | (3)                                                                                                                                                                                                                                                                                                                                                                                     | where the
 cause of failure to supply the scheduled electricity quantity can be
 attributed to the power sale market. 
|    |                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                       
|6.2 | If the
 electric quantity planned to be transmitted to the grid can not be completed
 according to the terms of the Contract due to the reasons attributable to the
 Seller, unless it is caused by a force majeure event, the Seller shall pay as
 compensation to the Buyer for the undelivered electric quantity at the
 on-grid tariff prescribed in this Contract.                
|    |                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                       
|    | In the
 event of the Buyers external power outage due to reasons attributable to the
 Seller, the Seller shall be liable to compensate the Buyer. The compensation
 shall be the electric quantity not supplied by the power supply enterprises
 during the time of power outage multiplying the average unit price of the
 electricity sold by the Buyer of the previous month.      
|   
|   
|   
|    |                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                       
|6.3 | If the
 Buyer fails to pay the tariff to the Seller in accordance with this Contract,
 the Buyer shall pay the Seller a delay fee, which is calculated at a rate of
 0.03% of the due but unpaid tariff on a daily basis commencing from the date
 of default.                                                                                                                         
|   
|   
|    |                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                       
|6.4 | If the
 quality of electricity fails to meet the standards due to the reasons
 attributable to the Seller, the Seller shall assume the liability for damages
 caused to itself. For damages suffered by the Buyer or other users, the
 Seller shall be liable to make corresponding compensations.                                                                                     
|   
|   
|    |                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                       
|6.5 | The
 Seller shall abide by the overall arrangement made by the dispatch office of
 the Buyer, follow its instructions, participate in the systematic adjustment
 such as frequency moderation, peak-hour moderation and voltage moderation.
 Besides, it shall operate in accordance with the load curve required by the
 Nujiang Prefecture.                                          
|   
|   
|   
|    |                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                       
|7   | Dispute Settlement                                                                                                                                                                                                                                                                                                                                                                     
|    |                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                       
|    | In case
 of any dispute arising from the performance of this Contract between the
 Buyer and the Seller, it shall be settled through consultations according to
 the principles set forth in this Contract. If no agreement can be reached,
 either Party may institute proceedings to the court in the place where the
 Buyer is located.                                             
|   
|   
|   
|    |                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                       
|8   | Effect of this Contract and Matters not Covered                                                                                                                                                                                                                                                                                                                                        
|    |                                                                                                                                                                                                                                                                                                                                                                                         |                                                                                                                       
|8.1 | Matters
 not covered in this Contract shall be handled in accordance with the Contract
 Law of the Peoples Republic of China, the Power Law of the Peoples Republic
 of China, the Regulations                                                                                                                                                                                       

6

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|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | 
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | 
|    | of the
 Peoples Republic of China on the Administration of Power Dispatching, the
 Power Purchase and Sale Contract formulated by the State Electricity
 Regulatory Commission, Yunnan Province Power Supply and Use Regulations, the
 Measures of Yunnan Nujiang Grid Co., Ltd. for the Management of the
 Connection of Newly Established Power Plants to the Grid and other relevant
 laws and regulations. In the event of change to the laws, regulations and
 policies of the state or the province, amend or supplement relevant terms of
 this Contract accordingly or separately enter into a contract.
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | 
|8.2 | Monthly
 (daily) power purchase plan issued by the Buyer to the Seller, and the
 on-grid load curve shall be an integrated part of this Contract, and have the
 equal effect.                                                                                                                                                                                                                                                                                                                                                                                                                                    
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | 
|8.3 | This
 Contract shall come into force upon execution and affixing of official seals
 by the Buyer and the Seller. The term of this Contract shall commence on 1
 January 2010 and end on 31 December 2010. This Contract shall, in principle,
 be reviewed and signed once a year. If no change is proposed by either Party,
 this Contract shall continue to be effective until the execution of a new
 contract.                                                                                                                                                                                                
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | 
|8.4 | This
 Contract shall be executed in 2 originals and 2 duplicates. The Buyer and the
 Seller shall each hold an original and a duplicate, which are equally
 effective.                                                                                                                                                                                                                                                                                                                                                                                                                                           
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | 
|    | Buyer:
 Yunnan Nujiang Grid Co., Ltd.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | 
|    | Legal
 Representative or Agent: Cai Xianglong                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    

| |                                                                   | 
| | ----------------------------------------------------------------- | 
| | Date of
 Execution: 1 January 2010                               
| |                                                                   | 
| | Seller:
 Fugong County Hengda Hydroelectric Development Co., Ltd.
| |                                                                   | 
| | Legal
 Representative or Agent: Huang Guoping                    
| |                                                                   | 
| | Date of Execution: 1 January 2010                                

7

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