Document:

AMENDMENT
      TO INVESTORS’ RIGHTS AGREEMENT

     

    This
      Amendment to Investors’ Rights Agreement is entered into as of December 27,
      2007, by and among Huiheng Medical, Inc., a Nevada corporation (the “Company”),
      and those holders of outstanding shares of Series A Preferred Stock issued
      by
      the Company (the “Series A Holders”) who execute this Amendment, with respect to
      the following:

     

    A. Under
      the
      terms of the Securities Exchange Agreement dated as of May 15, 2007 (the
“Exchange Agreement”) by and among the Company (then known as Mill Basin
      Technologies, Ltd.) and various other parties, including the shareholders of
      Allied Moral Holdings, Ltd. (with a portion of such shareholders receiving
      shares of Series A Preferred Stock of the Company), the Company agreed to assume
      the registration obligations of Allied Moral Holdings under the Investors’
Rights Agreement of January 11, 2007 (the “Rights Agreement”), subject to
      certain conditions;

     

    B. As
      a
      result of the recent changes in Rule 144 promulgated by the Securities and
      Exchange Commission, and the lock up agreements that will be required by the
      underwriters of the currently contemplated public offering of the common stock
      of the Company, the Series A Holders and the Company contemplate that the Series
      A Holders will be able to sell their shares of common stock issuable upon
      conversion of the Series A Preferred Stock (the “Conversion Shares”) under Rule
      144 simultaneously or shortly after the expiration of the 90 day lock up period
      set forth in the lock up agreements. As such, the Series A Holders and the
      Company believe that there is no longer any utility to require the Company
      to
      file a registration statement for the resale of the Conversion Shares;
      and

     

    C. To
      remove
      any ambiguity relating to the terms of the Rights Agreement that remain in
      effect, the Series A Holders and the Company desire to confirm that any
      potential penalties associated with either the failure to obtain the
      registration of the Conversion Shares within the time specified in the Rights
      Agreement or the failure to maintain such registration in effect shall be waived
      and extinguished.

     

    NOW,
      THEREFORE, for and in consideration of the forgoing and the following terms
      and
      conditions, the parties hereto agree as follows:

     

    1. Termination
      of Registration Obligations.
      Any
      remaining obligations in the Rights Agreement that have been assumed by the
      Company under the Exchange Agreement are hereby terminated.

     

    2. Waiver
      of Damages.
      Any
      damages related to the Rights Agreement that have accrued or may accrue in
      the
      future are hereby waived and extinguished.

     

    
      
         

      

      
         

        
          

        

      

      
         

      

    

     

    3. Processing
      of Transfers.
      Within
      five business days after the business day on which the Company receives (i)
      a
      notice that the Conversion Shares have been sold pursuant to Rule 144 (or of
      the
      completion of a period during which the Conversion Shares need to bear a
      restricted securities legend under applicable securities laws), (ii) the
      original certificates representing the shares of Series A Preferred Stock (or
      Conversion Shares, as the case may be) that were issued with a restricted
      securities legend, and (iii) to the extent required by Rule 144, customary
      representation letters and/or broker letters concerning compliance with the
      requirements of Rule 144, the Company shall deliver (or cause to be delivered)
      to its transfer agent appropriate instruction and opinion letters directing
      the
      delivery of certificates for the Conversion Shares without legends. This
      obligation may be satisfied, when permitted by applicable legal requirements,
      by
      delivery of entries reflecting electronic transfers of the Conversion Shares
      to
      a brokerage account (designated by the applicable Series A Holder) with the
      Depository Trust Company through its Deposit Withdrawal Agent Commission
      System.

     

    This
      Amendment may be executed in one or more counterparts, all of which when taken
      together shall constitute one in the same instrument, and shall be effective
      when it has been signed by the Company and the holders of more than a majority
      of the outstanding shares of Series A Preferred Stock.

     

    
      	
              HUIHENG
                MEDICAL, INC.

               

              By:               

                  Li
                Bo,
                Secretary

               

               

            
	
              SERIES
                A HOLDER

               

              Name:                                                                                                                               

               

              By:                                                                                                                                    

               

              Title:                                                                                                                                  

                       
                (If signing in a representative
                capacity)

            

    

    

    
      
         

      

      
        2FORM
      OF

     

    EQUIPMENT
      SALES CONTRACT

     

    Reference
      No.:

     

    Date
      of
      Execution:

     

    Place
      of
      Execution:

     

    Buyer: ____________________________

    

    Seller:
      Tibet Changdu Shengfeng Industry Development Co., Ltd.

     

    Buyer
      and
      Seller, adhering to the principles of equality and mutual benefits and through
      friendly consultations, for the deal concerning the _______________ (hereinafter
      referred to as the “equipment”) agree to enter into this Contract:

     

    Name,
      Specification, Origin, Price, Quantity and Amount of the
      Object

     

    
      	Article 1:	
              The
                commercial name, specification, price, quantity and amount of the
                equipment which is purchased by Buyer and is sold by
                Seller.

            

    

     

    Unit:
      RMB
      Yuan

     

    
      
        	
                Commercial
                  Name 

                of
                  the Equipment

              	 	
                Model

              	 	
                Unit

              	 	
                Unit
                  Price

              	 	
                Quantity

              	 	
                Total
                  

                Amount

              	 
	
                ____________________

              	 	 	
                
                
__________	 	 	
                Set 

              	 	 	__________ 	 	 	
                1

              	 	 	__________	 
	
                Total
                  Prices 

                (Capitalization)

              	 	 	
                RMB
                  ________

              

      

    

    

    
      	Article 2:	
              Quality:
                in accordance with the enterprise’s standard of the equipment’s
                manufacturer.

            

    

     

    
      	Article 3:	
              Package:
                Seller shall adopt the package suitable for railway or highway’s
                transportation.

            

    

     

    
      
        
        

      

      
        1

        
          

        

      

      
        
        

      

    

    Method
      of Buyer’s Payment

     

    
      	Article 4:	
              The
                payment shall be payable in five (5)
                installments.

            

    

     

    
      	
            	The first installment:	
              Within
                three (3) days of this Contract being effective, Buyer will pay the
                first
                installment of RMB __________ to
                Seller.

            

    

     

    
      	
            	The second installment:	
              Within
                thirty (30) days of this Contract being effective, Buyer will pay
                the
                second installment of RMB __________ to Seller and by this means
                Buyer
                will have paid 30% of this Contract’s consideration in total to
                Seller;

            

    

     

    
      	
            	The third installment:	
              After
                the equipment room being checked and accepted, Buyer will pay the
                third
                installment of RMB __________ which is 30% of the total consideration
                within 30 days of seller issuing the Forwarding in Preparation
                Declaration;

            

    

     

    
      	
            	The fourth installment:	
              After
                the equipments’ transportation, installment & debugging, and check
                & acceptance being accomplished, Buyer will pay the fourth installment
                of RMB __________ which is 30% of the total consideration within
                30 days
                of Buyer and Seller’s representatives executing the Testing Report for
                Check and Acceptance;

            

    

     

    
      	
            	The fifth installment:	
              After
                the equipment being installed, checked and accepted, Buyer will pay
                the
                remaining sum of RMB __________ to Seller within one year of Buyer
                and
                Seller’s representatives executing the Testing
                Report.

            

    

     

    
      	Article 5:	
              After
                receiving the total payment from Buyer, Seller will draw an invoice
                in due
                form according to all gathering invoices returned by
                Buyer.

            

    

     

     

    Delivery
      Method of the Equipment

     

    
      	Article 6:	
              Construction
                of the equipment room: After the Contract being effective, Seller
                will
                provide the Guidance Handbook for Equipment Room’s Construction which is
                drafted according to the related State standard and provisions, and
                Buyer
                will authorize a design entity with corresponding qualification to
                accomplish the capital construction’s design of the equipment room. The
                blueprint of the equipment room shall be examined and approved by
                Seller;
                once Seller subscribe its opinion in writing Buyer can process the
                construction upon such blueprint, and Buyer shall complete the
                construction of the equipment room in 3
                months.

            

    

     

    
      	Article 7:	
              Check
                and acceptance of the equipment room: Buyer will send an Equipment
                Room
                Check & Acceptance Notice to Seller after the equipment room’s
                construction is accomplished. Within 3 days of Seller receiving the
                Equipment Room Check & Acceptance Notice, Seller may arrange the
                technical staff dispatched by the equipment’s manufacturer to act as
                Seller’s representative, and to check and accept the equipment room
                according to the blueprint and the Guidance Handbook for Equipment
                Room’s
                Construction. While the technical staff dispatched by the equipment’s
                manufacturer affirms that the equipment room complies with the
                requirements in the Guidance Handbook for Equipment Room’s Construction,
                the representatives of The Parties will sign on the Equipment Room’s Check
                and Acceptance Form.

            

    

     

    
      
        
        

      

      
        2

        
          

        

      

      
        
        

      

    

     

    
      	Article 8:	
              Delivery
                Arrangement: Seller is responsible for delivery of the equipment
                and
                transporting the equipment to the place appointed by Buyer; Buyer
                is
                responsible for appointing and arranging the space which are in compliance
                with the conditions of the equipment’s preservation and maintaining the
                equipment and Buyer will be responsible for the safe keeping after
                the
                equipment being arrival.

            

    

     

    
      	Article 9:	
              Conditions
                of the equipment’s delivery: Seller will organize the delivery of the
                equipment upon it receiving the second installment from Buyer and
                transport the equipment to the place appointed by Buyer after the
                representatives of the Parties affirming the eligibility of the equipment
                room.

            

    

     

    
      	Article 10:	
              Transportation
                insurance: Seller shall be liable for the insurance of transporting
                the
                equipment and the insurance in the course of
                transportation.

            

    

     

    
      	Article 11:	
              After
                the equipment being transported to the appointed place, the responsibility
                of maintaining the equipment is on Buyer; from the date of the equipment
                being transported to the place appointed by Buyer to the date of
                Buyer
                paying off the total payment, the risks of the equipment being destroyed
                or loss shall be carried by Buyer.

            

    

     

    
      	Article 12:	
              Unpacking
                inspection: Within three days of taking delivery of the equipment
                at the
                place appointed by Buyer, the representatives of Buyer and Seller
                shall
                make unpacking inspection. The package shall be unpacked only the
                representatives appointed by Buyer and Seller are on site. Any Party
                cannot unpack the package, install or debug the equipment without
                authorization. If the unpacking without authorization results in
                any
                damage (such as the shortage or destruction), the Party of unpacking
                shall
                be liable for the losses of it.

            

    

     

    Installment,
      Debugging and Inspection of the Equipment

     

    
      	Article 13:	
              Corresponding
                conditions’ preparation: For the purpose of succeed in the work of
                installation and debugging and inspecting and operating the equipment
                on
                time, Buyer shall provide necessary convenient conditions for Seller’s
                installation and examination work, including but not limited to providing
                exterior line and coordinating the relations with other relevant
                authorities and so on.

            

    

     

    
      	Article 14:	
              Examination
                Method: Seller will organize the function test and examination within
                7
                days of the accomplishment of equipment’s installation. Buyer and Seller
                shall appoint respective representatives to supervise all functions’ test
                on site. If the result of test is acceptable, the Parties shall sign
                on
                the examination and test report and file such report. If any Party
                refuse
                to participate in the functions’ test and examination without reasonable
                ground, the result of test and examination conducted by the other
                Party
                alone will be effective.

            

    

     

    
      
        
        

      

      
        3

        
          

        

      

      
        
        

      

    

     

    Rights
      and Obligations of Seller

     

    
      	Article 15:	
              Seller
                shall accomplish such equipment’s production within the three months of
                Buyer paying the first installment upon the provisions of the
                Contract.

            

    

     

    
      	Article 16:	
              Seller
                shall deliver the equipment for transportation within seven (7) days
                of
                the equipment room being checked and accepted and the second installment
                being paid to Seller’s account by
                Buyer.

            

    

     

    
      	Article 17:	
              After
                this Contract being effective, Seller will provide the Guidance Handbook
                for Equipment Room’s Construction which is drafted according to the
                related State standard and provisions. While the equipment room is
                accomplished, Seller will check and accept the equipment room upon
                the
                blueprint and the Guidance Handbook for Equipment Room’s Construction. If
                the equipment room is eligible the Equipment Room’s Check and Acceptance
                Form shall be signed. If any unqualified part is found during the
                process
                of check and acceptance, Buyer is liable to arrange modification
                and
                change upon the opinion of Seller’s representative (technical staff
                dispatched by the equipment’s manufacturer) until the requirements of the
                Guidance Handbook for Equipment Room’s Construction are satisfied. Seller
                reserve the right of re-examination. Only if the equipment room of
                Buyer
                complies with the requirements from the Guidance Handbook for Equipment
                Room’s Construction, Seller will deliver and install the equipment
                hereunder.

            

    

     

    
      	Article 18:	
              Technical
                support: Seller will provide technical support to the sold equipment
                hereunder. Seller will provide one-year’s guarantee to keep the equipment
                in good repair from the date of the Parties executing the examination
                and
                test report.

            

    

     

    
      	Article 19:	
              The
                followings are excluded from the scope of
                guarantee:

            

    

     

    1. The
      fault
      is caused by the maintenance of the person who is not trained and recognized
      by
      Seller

     

    2. The
      fault
      is caused by using the computer system and its accessories provided by the
      Party
      other than Seller;

     

    3. The
      fault
      is caused by the improper operation and maintenance of Buyer and/or the operator
      of Buyer;

     

    4. The
      fault
      is caused by Buyer or any third party making unwarranted design, modification
      and change to the equipment’s operation system or parts without Seller’s
      permission;

     

    
      
        
        

      

      
        4

        
          

        

      

      
        
        

      

    

    5. The
      fault
      is caused by natural disaster and other force majeure;

     

    6. The
      fault
      is caused by the wrong which cannot be attributed to Seller.

     

    
      	Article 20:	
              Exclusion
                of fault: Seller promise that if any fault is arising in the term
                of
                guarantee, the technical representative of Seller shall instruct
                Buyer to
                exclude the fault by fax, telephone and/or e-mail within 24 hours
                of
                receiving Buyer’s notice in writing. If the fault is not excluded, Seller
                shall dispatch persons for on-site repair services within 24 hours
                of
                receiving the request in writing again, the relating expenses are
                borne by
                Seller. Provided the term of guarantee being expired and there is
                any
                fault with the equipment, the Parties shall stipulate the time of
                maintenance, the service charge shall be collected according to the
                Service Charge Standard made by the equipment’s manufacturer; if any part
                or accessory need to be exchanged, the part or accessory shall be
                charged
                additional expenses according to the Price List for Part & Accessory
                made by the equipment’s
                manufacturer.

            

    

     

    
      	Article 21:	
              In
                the term of guarantee Seller shall be responsible for regular examination
                of the provided equipment’s focal qualification semiannually and shall
                provide related report, any generated expenses shall be borne by
                Seller.
                While the term of guarantee is expired, Buyer will be charged the
                expenses
                of annually examining the equipment according to the Service Charge
                Standard.

            

    

     

    
      	Article 22:	
              If
                in term of guarantee any fault is with the equipment and its parts
                and is
                informed to Seller in writing, Seller must provide free maintenance
                and
                part for replacement; the replaced parts will be Seller’s
                properties.

            

    

     

    
      	Article 23:	
              Seller
                can provide services of exchanging Cobalt Resource, Buyer shall bear
                relevant expenses.

            

    

     

    
      	Article 24:	
              Seller
                provides four weeks’ trainings which is relevant to using the equipment
                and maintenance to Buyer’s staff, the detailed training time shall be
                negotiated by the Parties additionally. The content of the training
                includes fundamental theory, operation and maintenance, equipment
                clinic
                treatment. The training fee shall be borne by Seller. In accordance
                with
                the training record and the result of examination, Seller shall provide
                the examination results of the trainee to Buyer, and award the qualified
                trainee the qualification
                certification.

            

    

     

    Rights
      and Obligations of Buyer

     

    
      	Article 25:	
              In
                accordance with the progress confirmed by the Parties, Buyer shall
                prepare
                all kinds of necessary licenses for purchase and installation within
                three
                months of this Contract being effective, and shall provide the copies
                of
                such licenses to Seller; the relevant expenses and risks shall be
                borne by
                Buyer.

            

    

     

    
      	Article 26:	
              Buyer
                shall obtain the Cobalt Resource’s transportation license and entry permit
                from the Public Health, Epidemic Prevention, Environmental Protection,
                and
                Police Departments of the place where the equipment located, and
                shall
                provide the duplicate of the permission to Seller; Buyer shall bear
                the
                relevant expenses and risks.

            

    

     

    
      
        
        

      

      
        5

        
          

        

      

      
        
        

      

    

     

    
      	Article 27:	
              Buyer
                shall accomplish relevant work upon the progress regulated in this
                Contract. If Buyer’s delay causes the equipment and/or its accessories
                cannot be delivered on time, the time of Seller delivering and consignment
                shall be deferred accordingly, and Buyer shall bear relevant expenses
                and
                risks. However, such defer cannot effect Buyer pay the consideration
                upon
                the provisions of this Contract.

            

    

     

    
      	Article 28:	
              Buyer
                shall arrange the user of the equipment to dispatch three persons
                to join
                the equipment’s operation training organized by Seller, and shall ensure
                that the equipment’s operator is the person who obtains the qualification
                certification in the training.

            

    

     

    
      	Article 29:	
              Besides
                the treatment system clinic operation staff, there shall be a radiation
                physics staff and a professional mechanical and electric maintenance
                staff
                arranged by the equipment’s user for operating the
                equipment.

            

    

     

    
      	Article 30:	
              Buyer
                shall require the user to comply with the Quality Guarantee Procedure
                and
                the Operation Handbook which are provided by Seller to process the
                work
                hereunder.

            

    

     

    
      	Article 31:	
              Buyer
                shall require the user to provide the clinic data of the clinic treatment
                cases to Seller periodically upon Seller’s
                requirements.

            

    

     

    
      	Article 32:	
              Buyer
                shall keep confidential for all trade secrets which are relating
                to the
                equipment provided by Seller and not used in public, such as detailed
                technical data and commercial data. Whenever the above mentioned
                materials
                only can be used for this Contract’s performance and be exchanged among
                the persons relevant to this product; Buyer shall bear the consequence
                and
                result of the dispute caused by the
                disclosure.

            

    

     

    Modification
      and Termination

     

    
      	Article 33:	
              This
                Contract and its appendixes may be modified or supplemented only
                after the
                Parties have executed and stamped for
                confirmation.

            

    

     

    
      	Article 34:	
              The
                Parties may decide to terminate the Contract ahead of time by mutual
                consent and make a written document with the Parties stamps
                hereof.

            

    

     

    
      	Article 35:	
              While
                any Party request to modify or terminate this Contract, the Party
                proposing such modification or termination shall notify the other
                Party in
                writing; the other Party shall answer such request in writing within
                three
                (3) days of receiving the written notice, otherwise the deferment
                and no
                answer will be regarded as tacit
                acquiescence.

            

    

     

    
      
        
        

      

      
        6

        
          

        

      

      
        
        

      

    

    Liability
      for Breach of Contract

     

    
      	Article 36:	
              If
                Seller cannot deliver the goods on time the payment of the third
                installment paid by Buyer can be deferred accordingly. If the goods’
                delivery is deferred 30 days, it will be regarded as Seller unable
                to
                deliver the goods, and Buyer has the right to terminate this Contract
                and
                request Seller to return the paid amount; simultaneously, Buyer has
                right
                to request Seller to pay the fine for breach of this Contract amounting
                to
                0.05% of the paid amount per day.

            

    

     

    
      	Article 37:	
              Provided
                Buyer cannot pay all or party of the amount on time, Buyer shall
                pay the
                fine amounting to 0.05% of the deferred payment per date, and the
                delivery
                date of Buyer may be deferred accordingly. If such default exceeds
                thirty
                (30) days, it will be regarded as Buyer breaching the Contract and
                Seller
                has the right to take back the delivered equipment; if the product
                has
                already been delivered and used, Buyer shall be liable for the equipment’s
                cease, any losses and liabilities caused by Buyer deferring its payment.
                Seller shall have the right to claim the compensation from the defaulting
                party.

            

    

     

    
      	Article 38:	
              Should
                a Party be directly prevented from performing this Contract or be
                delayed
                in performing this Contract by an event of force majeure, such as
                earthquake, typhoon, flood, fire and war and other unforeseen events,
                the
                happening and consequences of which are unpreventable and unavoidable,
                the
                affected Party shall notify the other Party by cable without delay
                and,
                within fifteen (15) days thereafter, provide detailed information
                regarding the event of force majeure and valid certificate thereof,
                explaining the reason for its inability to perform this Contract.
                Such
                certificate as proof of the existence of force majeure shall be issued
                by
                the notary public office at the locality where the event of force
                majeure
                occurred. The Parties shall, through consultation, decide whether
                to
                terminate this Contract, or release part of the affected Party’s
                responsibilities to perform this Contract, or delay the performance
                hereof.

            

    

     

    Dispute
      Resolution

     

    
      	Article 39:	
              Any
                dispute arising out of this Contract or from its performance shall
                be
                resolved through friendly consultation between the Parties. If the
                dispute
                cannot be resolved, the dispute shall be submitted to the arbitration
                committee in accordance with its arbitration proceeding and rules.
                The
                arbitral award shall be final and binding upon the
                Parties.

            

    

     

    Contract’s
      Effectiveness and Miscellaneous

     

    
      	Article 40:	
              This
                Contract shall be effective on the date of the Parties’ legal
                representatives executing and affixing a seal on this
                Contract.

            

    

     

    
      
        
        

      

      
        7

        
          

        

      

      
        
        

      

    

    
      	Article 41:	
              Matters
                not covered in this Contract shall be dealt with in separate instruments
                to be entered into by the Parties through friendly consultations.
                Such
                supplementary instrument shall have the same legal force as this
                Contract.

            

    

     

    
      	Article 42:	
              The
                terminologies or the name applied in this Contract and its appendixes
                shall have the meanings as
                followings:

            

    

     

    1. The
      Equipment: _______________ (__________ Model) which is constituted by the
      mainframe, electric control system, Cobalt Resource, stereo orientation system,
      and _______________ system and so on.

     

    2. Mainframe:
      the mainframe of the equipment.

     

    3. Cobalt
      Resource: Cobalt - 60 radiation resource.

     

    4. Installing
      the resource: the process of putting the Cobalt Resource into the
      equipment

     

    5. Changing
      the resource: taking the old Cobalt Resource out of the Equipment and putting
      it
      into an empty container and processing the disposal of the wasted resources,
      and
      putting the new Cobalt Resource into the equipment.

     

    
      	Article 43:	
              Contract
                Appendix:

            

    

     

    1. The
      equipment’s configure list

     

    
      	Article 44:	
              This
                Contract is executed in quadruplicate. Each Party hereto shall hold
                two
                (2) counterparts.

            

    

     

    
      	
              Buyer:

            	 	
              Seller:

            
	 	 	 
	 	 	 
	
              (Seal)

            	 	
              Seal)

            
	 	 	 
	 	 	 
	
              Signature
                of the Representative

            	 	
              Signature
                of the Representative

            

    

    

    
      	
              Date:
                

            	 	 	
              Date:
                

            	 

    

    

    
      
        
        

      

      
        8

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