Exhibit 4.3
 * Confidential treatment has been requested for certain portions omitted from this exhibit pursuant
to Rule 24b-2 under the Securities Exchange Act of 1934, as amended. Confidential portions of this
Exhibit have been separately filed with the Securities and Exchange Commission.
 English translation as reference only
 JA Solar Holdings Co., Ltd.
Solar Photovoltaic Industrial Base Project
Investment Agreement
     1.
    
    Hefei High-tech Industry Development Zone (Hefei High-tech Zone) is one of the first China
National Economic and Technical Development Zones approved for establishment by the State
Council of the PRC. As the administrative body of Hefei High-tech Zone, Party A highly
appraises the performance achieved by Party B in new energy field, hoping Party B to introduce
advanced technology and management concept for the construction of new energy industrial base
of Hefei High-tech Zone.
 2.
    
    Party B, as the world largest solar cell manufacturer and a diversified business operator in
new energy field, specializing in R&D and production of solar polycrystalline silicon ingot,
polycrystalline silicon wafers, solar cells and modules, owning the most advanced production
technology and equipment in the world and a complete solar energy industrial chain, has the
desire to introduce advanced technology and management concept for the construction of new
energy industrial base of Hefei High-tech Zone.
 3.
    
    The Parties would like to strengthen the mutual cooperation on the follow-up projects in new
energy field and build up a strategic cooperation relationship, following the investment by
Party B in the silicon wafers, solar cells and modules production project in Hefei High-tech
Zone.




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* Confidential treatment has been requested for certain portions omitted from this exhibit pursuant
to Rule 24b-2 under the Securities Exchange Act of 1934, as amended. Confidential portions of this
Exhibit have been separately filed with the Securities and Exchange Commission.
  I.
    
    DEFINITIONS
 1.
    
    The annual capacity of 3GW silicon wafers, 3GW solar cells and 3GW solar modules, which is
expected to be completed in three phases.
 2.
    
    Project Company means that Party B proposes to incorporate and register JingAo (Hefei) New
Energy Co., Ltd. (proposed name, New Energy Company) with a registered capital of US$0.1
billion (to be paid in by installments in accordance with laws of the PRC) in Hefei through
its offshore holding company; the New Energy Company will, as the investment and financing
entity, duly incorporate the Project Company in Hefei High-tech Zone, given the proposed name
of JingAo (Hefei) Solar Technology Co., Ltd., which will construct and operate the Project
as an independent legal person (Project Company), of which the registered capital will be no
less than RMB1 billion (to be paid in by installments in accordance with laws of the PRC).
 3.
    
    Party As Designated Company means the state-owned investment and construction entity
subordinate to Party A.
 4.
    
    Joint Working Group means the Project management team consisting of relevant staff of the
Parties, being responsible for coordinating and promoting the construction and operation of
the Project before the Project is completed and launched for production.
 5.
    
    Project Approvals means all the governmental examination and approval, registration and
filing to be obtained for the construction and operation of the Project, including without
limitation, the verification/filing, environmental protection examination and approval, land
use examination and approval, planning examination and approval, and the application for
construction with respect to the Project.
 6.
    
    GW means 1000 megawatt.
 II.
    
    COOPERATIVE MODEL
 1.
    
    Incorporation of Project Company
  2.
    
    Finance
   2




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* Confidential treatment has been requested for certain portions omitted from this exhibit pursuant
to Rule 24b-2 under the Securities Exchange Act of 1934, as amended. Confidential portions of this
Exhibit have been separately filed with the Securities and Exchange Commission.
 III.
    
    PROJECT
  1.
    
    Content of Project
  2.
    
    Project Construction Timeline
     3.
    
    Input and Output
  Investment to silicon wafers
    
    RMB2 billionInvestment to solar cells
    
    RMB1.5 billionInvestment to solar modules
    
    RMB0.3 billionInvestment to motive device
    
    RMB0.5 billion
  3




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* Confidential treatment has been requested for certain portions omitted from this exhibit pursuant
to Rule 24b-2 under the Securities Exchange Act of 1934, as amended. Confidential portions of this
Exhibit have been separately filed with the Securities and Exchange Commission.
  4.
    
    Party B warrants to equip corresponding technical and R&D personnel compatible with the
scale of the Project Company in Hefei High-tech Company, and to introduce its technology and
theory in respect of solar photovoltaic industry to the proposed Project Company. Party B
plans to establish a solar photovoltaic R&D centre in Hefei High-tech Zone.
 IV.
    
    SUPPORTING POLICIES
  1.
    
    Party A will assist the Project Company to ***.
 2.
    
    Party A will assist the Project to ***, assist the Project Company to apply for and enjoy
related supporting policies provided by the State, Anhui province, and Hefei local government.3.
    
    Party A will assist the Project Company to ***.
 4.
    
    Within *** upon the launch for production of phase I, Party A shall allocate *** of the Hefei
local government reserved portion in the value-added taxes and income taxes paid by the
Project Company to the Project Company as rewarding. Within *** upon the expiration of above
mentioned***, Party A shall Party A shall allocate *** of the Hefei local government reserved
portion in the value-added taxes and income taxes paid by the Project Company to the Project
Company as rewarding.
 5.
    
    Party A shall provide support and assistance with public listing of the Project Company in an
active manner. If the Project Company is successfully listed, Party A will reward the Project
Company pursuant to relevant rules of Hefei Government.
 6.
    
    Party A undertakes to make every possible endeavor to provide utmost assistance to the
Project Company with respect to human resources introduction, technology development,
planning, land use, funding, environmental protection, and governmental examination and
approval, registration and filing.
  4




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* Confidential treatment has been requested for certain portions omitted from this exhibit pursuant
to Rule 24b-2 under the Securities Exchange Act of 1934, as amended. Confidential portions of this
Exhibit have been separately filed with the Securities and Exchange Commission.
 7.
    
    Party A will coordinate with related authorities such as power supply department, to assist
Party B to establish a solar energy sample project with the annual capacity no less than 10GW.
 8.
    
    The Project Company may not repeatedly enjoy above mentioned supporting policies, and shall
be subject to the change in laws, regulations and policies of the national, provincial and
municipal governments.
 V.
    
    PROJECT APPROVALS
  VI.
    
    PROJECT LOCATION AND CONSTRUCTION
 1.
    
    Party A shall ensure the availability of land for purpose of the Project. The proposed
Project will be located at the southeastern corner of the intersection of Changning Avenue and
Boyanwan in Hefei High-tech Zone, with the area of 2,250 mu approximately (subject to the
final approval by the land and resources authority). The investment to one unit of land should
not be lower than *** (subject to the final approval by the land and resources authority). The
Project Company shall have an overall land use plan, and will be assigned certain parcels of
land in batches in accordance with applicable laws and regulations as well as the land use
policies at provincial and municipal levels.
 2.
    
    The Project shall be in compliance with the industrial development planning, land use
planning, environmental protection planning and other planning requirement of Hefei and Hefei
High-tech Zone, and related laws, regulations and rules at national, provincial and municipal
levels as well as other governmental documents.
 3.
    
    The land planned for the Project and the buildings and structures on the land can only be
used for the construction and operation of the Project hereunder which is verified by
competent authorities. Party B should not at its own discretion construct any unverified or
approved project on the Project land, or change the land use purpose, or transfer, sell or
lease the land or the building or structure thereon by violating laws regulations or without
Party As consent. Otherwise, Party A has the right to retrieve the land.
 4.
    
    Party A shall timely provide all necessary infrastructure and auxiliary facilities compatible
with the construction and operation of the Project. The Parties may enter into an additional
memorandum with respect to the time, method and requirements regarding the provision of such
necessary infrastructure and auxiliary facilities compatible with development of the Project
within one (1) month upon the execution of this Agreement.
  5




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* Confidential treatment has been requested for certain portions omitted from this exhibit pursuant
to Rule 24b-2 under the Securities Exchange Act of 1934, as amended. Confidential portions of this
Exhibit have been separately filed with the Securities and Exchange Commission.
 VII.
    
    MISCELLANEOUS
 1.
    
    Supplemental
  2.
    
    Joint Working Group
  3.
    
    Force Majeure
  4.
    
    Breach Liabilities
  5.
    
    Special Provisions
    6




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* Confidential treatment has been requested for certain portions omitted from this exhibit pursuant
to Rule 24b-2 under the Securities Exchange Act of 1934, as amended. Confidential portions of this
Exhibit have been separately filed with the Securities and Exchange Commission.
 6.
    
    Dispute Resolution
  7.
    
    Confidentiality
  8.
    
    Effectiveness
   7




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* Confidential treatment has been requested for certain portions omitted from this exhibit pursuant
to Rule 24b-2 under the Securities Exchange Act of 1934, as amended. Confidential portions of this
Exhibit have been separately filed with the Securities and Exchange Commission.
  IN WITNESS WHEREOF
  Authorized Representative: Li BingBy:
    
    /s/ (Li Bing)Date:
  Authorized Representative: Fang PengBy:
    
    /s/ (Fang Peng)Date:
  8




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* Confidential treatment has been requested for certain portions omitted from this exhibit pursuant
to Rule 24b-2 under the Securities Exchange Act of 1934, as amended. Confidential portions of this
Exhibit have been separately filed with the Securities and Exchange Commission.
 Supplemental (I) to JA Solar Holdings Co., Ltd.
Solar Photovoltaic Industrial Base Project
Investment Agreement
  Supplements on Project Land Use
      1.
    
    Party A shall provide a parcel of land for industrial purpose with the area of *** for phase
I of the Project, to ensure to satisfy the Project land use needs according to the Project
process. Party A will reserve a parcel of land with the area of *** to satisfy the land use
needs from phase II and phase III of the Project (specific area of land subject to the final
approval by competent authority).
 2.
    
    Party A shall implement Ba Tong Yi Ping on the land in accordance with the He Gao Guan
(2010) No. 117 document, to ensure to satisfy Party Bs construction and operation needs.
 3.
    
    Party B will be duly assigned the land to be used for the Project in accordance with related
land use policies and procedures.
 4.
    
    In order to support Party Bs development, Party A will, in accordance with the He Zheng
(2010) No. 26 document, (duly and reasonably) ensure that the costs of Party B for obtaining
the land use right is *** by means of giving rewards in the form of fixed assets investment.
Party B undertakes to realize the output and taxes as set forth in the Investment Agreement.
  9




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##### 



* Confidential treatment has been requested for certain portions omitted from this exhibit pursuant
to Rule 24b-2 under the Securities Exchange Act of 1934, as amended. Confidential portions of this
Exhibit have been separately filed with the Securities and Exchange Commission.
 5.
    
    Party A will assign the land for Party Bs use for purpose of the Project, and Party B shall
conduct the planning and construction strictly in accordance with related national and local
land use policies. Party B should not change the land use purpose, or divide any parcel of
land for sale by means of share transfer, or sell any building or structure on the land. If
the majority shareholders of the Project Company change, then the consideration for land use
right shall be made up by ***.
 6.
    
    Party A shall be responsible for assisting Party B to coordinate with related departments
such as power supply plant, in order to satisfy Party Bs power usage needs at the utmost
extent allowed by related regulations. The Parties agree that, in accordance with the He Gao
Guan (2010) No. 117 document, the power supply auxiliary facilities inside the red line on the
Project land shall be constructed by Party B, and those outside the red line on the Project
land is within Party As responsibility.
 7.
    
    The planning and construction of buildings and structures on the land shall be implemented in
strict compliance with the approval opinions of the land administrative committee of Hefei.
The construction and launch for production of the Project shall also be implemented pursuant
to the land administrative committee of Hefeis requirements.
   10




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##### 



* Confidential treatment has been requested for certain portions omitted from this exhibit pursuant
to Rule 24b-2 under the Securities Exchange Act of 1934, as amended. Confidential portions of this
Exhibit have been separately filed with the Securities and Exchange Commission.
   Authorized Representative: Li BingBy:
    
    /s/ (Li Bing)Date:
  Authorized Representative: Fang PengBy:
    
    /s/ (Fang Peng)Date:
  11