Document:

Exhibit 4.51

Exhibit 4.51

English Translation for Reference

EQUITY PLEDGE CONTRACT

This Equity Pledge Contract (hereinafter referred to as “this Contract”) is made on June 30, 2008
in Beijing:

BETWEEN:

	Party A:	 	Aero Biotech Science & Technology Co., Ltd. (hereinafter also referred to as the
“Pledgee”)

	Address:	 	 Block 16, No. 26 Court, Xihuan South Road, Economic and Technological Development Zone, Beijing;

	Party B:	 	 Huang Hua, a citizen of the PRC with ID card number: 110108196204292252; (hereinafter
also referred to as the “Pledgor”)

	Party C:	 	 Taiyuan Primalights III Agriculture Development Co., Ltd. (hereinafter also referred to
as “P3A”)

	Address:	 	Middle Area of Highway 73, Zhuang Er Shang Village, Huang Ling Rural Area, Xiaodian
District, Taiyuan

WHEREAS:

	(1)	 	P3A (i.e. Party C) is a limited liability company incorporated and validly existing in
Taiyuan, Shanxi Province, the People’s Republic of China (hereinafter referred to as the
“PRC”, and for the purpose of this Contract, excluding the Hong Kong Special Administrative
Region, Macao Special Administrative Region and Taiwan) under the laws of the PRC;
	 
	(2)	 	The Pledgor is the legal and valid shareholder of P3A, who holds 40% equity interest of P3A
according to laws;
	 
	(3)	 	The Pledgee is a wholly foreign-owned enterprise legally established and validly existing in
the PRC, which provides technology support, technology consulting and related services to P3A.
It has now become a major cooperative partner of P3A;
	 
	(4)	 	The Pledgee and P3A entered into the Exclusive Technology Development, Technology Support and
Technology Services Contract, the Proprietary Technology License Contract and the Exclusive
Consultancy Service Contract on June 8, 2007. The Pledgor agrees to pledge all of his equity
interest in P3A as security for the performance by P3A of all of its obligations under the
above contracts;
	 
	(5)	 	The Pledgee, the Pledgor and P3A entered into the Exclusive Call Option Contract on June 30,
2008. The Pledgor agrees to pledge all of his equity interest in P3A as security for the
performance by the Pledgor and P3A of all of their respective obligations under the above
Exclusive Call Option Contract.

NOW, THEREFORE, IT IS AGREED between the Pledgee and the Pledgor as follows after friendly
consultation:

 

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	1.	 	Definitions
	 
	 	 	Unless otherwise required herein, the following terms shall have the meaning as follows:

	 	1.1	 	“Pledge Right” refers to the full content of Article 2 hereof.
	 
	 	1.2	 	“Equity Interest” means all the equity interest legally held by the Pledgor in
P3A.
	 
	 	1.3	 	“Master Contract” means the Proprietary Technology License Contract, the
Exclusive Technology Development, Technology Support and Technology Services Contract,
the Exclusive Consultancy Service Contract, the Exclusive Call Option Contract and any
amendment and supplement thereto.
	 
	 	1.4	 	“Secured Party” means any contractual party of each Master Contract other than
the Pledgee.
	 
	 	1.5	 	“Secured Debt” means all contractual obligations of a Secured Party under each
Master Contract, including (but not limited to) interest, default penalty,
compensation, expenses incurred by the Pledgee in realizing debt.
	 
	 	1.6	 	“Event of Default” means any circumstances stated in Article 7.1 hereof.
	 
	 	1.7	 	“Notice of Default” means the notice of default issued by the Pledgee pursuant
to this Contract, declaring the occurrence of an Event of Default.

	2.	 	Pledge Right
	 
	 	 	The Pledgor hereby pledges all of his Equity Interest in P3A to the Pledgee as security for
the performance by each Secured Party of all of its obligations for Secured Debt under the
Master Contract. Therefore, the Pledgee is entitled to the Pledge Right in respect of all
the Equity Interest of the Pledgor in P3A. The “Pledge Right” means the right of priority
to claim for any money converted from the Equity Interest pledged by the Pledgor to the
Pledgee, or any proceeds from the auction or sale of such Equity Interest that is enjoyed by
the Pledgee.

	3.	 	Registration of Pledge

	 	3.1	 	Within one (1) week from the date hereof, P3A shall, and the Pledgor shall
procure P3A to record the Pledge Right specified in Article 2 above on the register of
members of P3A, and deliver a copy of the register of members of P3A with its common
chop affixed thereon and the original of the equity contribution certificate of P3A to
the Pledgee for custody.
	 
	 	3.2	 	After the execution hereof, the Pledgor shall, at the written request of the
Pledgee at any time, complete the notarization jointly with the Pledgee in respect of
this Contract, as well as the Pledge Right of the Pledgee recorded on the register of
members and the equity contribution certificate as set forth in Article 3.1 at a notary
public office of the place where P3A is located.

 

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	 	3.3	 	The parties agree that they will make their best effort to register, and cause
the pledge hereunder to be registered with an industrial and commercial administrative
department of the place where P3A is registered. The parties also confirm that, unless
the registration of the pledge hereunder with the industrial and commercial
administrative department is mandatory in law, the validity of this Contract and the
Pledge Right specified in Article 2 above shall not be affected even if the parties
fail to register the pledge hereunder with the industrial and commercial administrative
department of the place where P3A is registered after the execution of this Contract.

	4.	 	Rights of the Pledgee

	 	4.1	 	When a Secured Party does not perform any of its obligations under the Master
Contract, the Pledgee shall have the right of priority to claim for any money converted
from P3A’s Equity Interest pledged by the Pledgor, or any proceeds from the auction or
sale of such Equity Interest.
	 
	 	4.2	 	The Pledgee shall be entitled to receive any dividends (including bonuses) and
other property distributions arising from the Equity Interest that is pledged.

	5.	 	Representations and Warranties of the Pledgor

	 	5.1	 	The Pledgor is the legitimate owner of the Equity Interest;
	 
	 	5.2	 	The Pledgor fully understands the contents of the Master Contract. He signs
and performs this Contract on a voluntary basis and all his actual meaning is truly
expressed herein. The Pledgor is legally authorized to execute this Contract;
	 
	 	5.3	 	All documents, information, statements and evidence provided by the Pledgor to
the Pledgee are accurate, true, complete and valid;
	 
	 	5.4	 	The Pledgor acknowledges that the Pledgee shall have the right to dispose of
and transfer the Pledge Right in a manner stipulated herein and within the scope
restricted by the PRC laws;
	 
	 	5.5	 	Except for the interest of the Pledgee, the Pledgor has not created other
pledges, any other kinds of rights or any third party rights over the Equity Interest;
	 
	 	5.6	 	Each of the Pledgors has obtained the consent of other shareholders of P3A to
pledge the Equity Interest, and the other shareholders have unanimously agreed that
they will not interfere by any means and will give up the exercise of their pre-emptive
right when the Pledgee actually exercises the Pledge Right.

	6.	 	Undertakings of the Pledgor
	 
	 	 	In addition to the obligations specified in the other provisions hereof, the Pledgor
undertakes as follows:

	 	6.1	 	During the term hereof, the Pledgor undertakes to the Pledgee for its benefit
that:

 

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	 	6.1.1	 	save for the transfer of the Equity Interest to the Pledgee,
the Pledgor shall not, without the prior written consent of the Pledgee,
transfer the Equity Interest, nor create or permit the existence of any pledge
which might affect the rights and interests of the Pledgee, nor procure any
resolution in relation to the sale/transfer/pledge or disposal by other means
of the legal and beneficial interest in any Equity Interest of P3A or
permitting the creation of any other security interests over it to be passed at
a shareholders’ meeting of the company; unless with the prior written consent
of the Pledgee, the Pledgor shall vote at a shareholders’ meeting of
P3A/procure any director of P3A nominated by him to vote at a board meeting of
P3A and/or by other means to object P3A to sell/transfer/pledge or otherwise
dispose of any of its major assets, including (but not limited to) any
intellectual property rights.
	 
	 	6.1.2	 	if the Equity Interest pledged hereunder is subject to any
compulsory measures imposed by courts or other departments for any reasons, the
Pledgor shall use all his efforts, including (without limitation) the provision
of other security to courts or adoption of other measures, to remove the
compulsory measures taken by courts or other departments in respect of the
Equity Interest pledged.
	 
	 	6.1.3	 	the Pledgor shall comply with and implement all laws and
regulations relevant to the pledge of rights. The Pledgor shall, within five
(5) days of the receipt of any notices, orders or recommendations given or made
by the competent authority with respect to the Pledge Right, present the above
notices, orders or recommendations to the Pledgee, and shall comply with the
same or raise objections and make representations in respect of the above
matters as reasonably required by or with the consent of the Pledgee.
	 
	 	6.1.4	 	the Pledgor shall promptly notify the Pledgee of any event
which might have effects on the Equity Interest of the Pledgor or any part of
his right or any notice received in connection therewith, as well as any event
which might change any warranty and obligation of the Pledgor as created by
this Contract or might have effects on it or any notice received in connection
therewith.

	 	6.2	 	The Pledgor agrees that the Pledgee shall not be interrupted nor impeded by any
legal proceedings instituted by the Pledgor or any successors of the Pledgor or any
person authorized by the Pledgor or any other persons when it exercises its rights on
the pledge pursuant to the provisions hereof and within the scope permitted by the PRC
laws.
	 
	 	6.3	 	The Pledgor undertakes to the Pledgee that, in order to protect or improve the
security for the repayment of the Secured Debt herein, he will honestly execute and
procure other parties who have an interest in the Pledge Right to execute all title
certificates and contracts required by the Pledgee, and/or perform and procure other
interested parties to perform all acts required by the Pledgee, and facilitate the
exercise of any right and authorization conferred to the Pledgee by this Contract.
	 
	 	6.4	 	The Pledgor undertakes to the Pledgee that he will execute all documents in
relation to the change of share certificates (if applicable and necessary) with the
Pledgee or any person designated by it (natural person/legal person), and shall provide
the Pledgee with all notices, orders and decisions in relation to the Pledge Right
which it thinks necessary within a reasonable time.

 

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	 	6.5	 	The Pledgor undertakes to the Pledgee that he will, for the interest of the
Pledgee, observe and perform all warranties, undertakings, contracts, representations
and conditions. If the Pledgor does not perform or fully perform his warranties,
undertakings, contracts, representations and conditions, he will indemnify the Pledgee
all losses suffered by it arising therefrom.

	7.	 	Event of Default

	 	7.1	 	The following events shall be deemed as Events of Default:

	 	7.1.1	 	the Secured Party fails to fully perform any of its Secured
Debts under the Master Contract as scheduled;
	 
	 	7.1.2	 	any representation or warranty made by the Pledgor in Article
5 hereof contains misleading or false information that is material, and/or the
Pledgor violates the warranties set forth in Article 5 hereof;
	 
	 	7.1.3	 	the Pledgor violates the undertakings set forth in Article 6
hereof;
	 
	 	7.1.4	 	the Pledgor violates any other provisions of this Contract;
	 
	 	7.1.5	 	the Pledgor gives up the pledged Equity Interest or transfers
the pledged Equity Interest without the written consent of the Pledgee;
	 
	 	7.1.6	 	any external loan, guarantee, compensation, undertaking or
other debt liability of the Pledgor (1) is required to be repaid or performed
prior to the scheduled date due to any breach of this Contract; (2) has been
due but cannot be repaid or performed as scheduled, which in the opinion of the
Pledgee, would have affected the ability of the Pledgor in performing his
obligations hereunder;
	 
	 	7.1.7	 	P3A is incapable to repay the general debts or other debts;
	 
	 	7.1.8	 	this Contract becomes illegal or the Pledgor fails to continue
to perform his obligations hereunder due to any reasons other than “force
majeure”;
	 
	 	7.1.9	 	there has been any adverse change in the properties of the
Pledgor, which, in the opinion of the Pledgee, would have affected the ability
of the Pledgor in performing his obligations hereunder;
	 
	 	7.1.10	 	there occurs any material adverse change in the assets, operating result or
financial situation of P3A;

 

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	 	7.1.11	 	the successors or heirs of P3A can only perform part of, or refuse to
perform, the Master Contract;
	 
	 	7.1.12	 	the Pledgor violates any other provisions of this Contract through any act or
omission to act.

	 	7.2	 	If the Pledgor is aware or discovers that any event described in this Article
7.1 or any event which may possibly result in the aforesaid events has happened, he
shall immediately notify the Pledgee in writing.
	 
	 	7.3	 	Unless the events of default listed in this Article 7.1 has been resolved to
the satisfactory of the Pledgee, the Pledgee may serve a written Notice of Default to
the Pledgee at any time when the Pledgor is in default or thereafter and require the
Pledgor to pay any debts and other payables under the Master Contract or to dispose of
the Pledge Right pursuant to Article 8 hereof.

	8.	 	Exercise of the Pledge Right

	 	8.1	 	Subject to the requirement in Article 6.1.1 hereof, the Pledgor shall not
transfer the pledged Equity Interest before the obligations of the Secured Party under
the Master Contract have not been fully performed and without the written consent of
the Pledgee.
	 
	 	8.2	 	The Pledgee shall serve Notice of Default to the Pledgor when exercising its
Pledge Right.
	 
	 	8.3	 	Subject to the requirement in Article 7.3 hereof, the Pledgee may exercise the
right to dispose of the Pledge Right at the time when the Notice of Default is given
pursuant to Article 7.3 or at any time after such notice is given.
	 
	 	8.4	 	The Pledgee shall have the right of priority to claim for any money converted
from all or part of the Equity Interest hereunder, or any proceeds from the auction or
sale of such Equity Interest according to statutory procedures until the outstanding
debts and all other payables of the Secured Party under the Master Contract are repaid.
	 
	 	8.5	 	When the Pledgee disposes of the Pledge Right in accordance with this Contract,
the Pledgor shall not pose any obstacles, and shall offer necessary assistance in this
regard so that the Pledgee can realize its Pledge Right.

	9.	 	Assignment of this Contract

	 	9.1	 	Unless with the prior consent of the Pledgee, the Pledgor or P3A shall have no
right to transfer any of his/its rights or obligations hereunder.
	 
	 	9.2	 	This Contract shall be binding upon the Pledgor and his successors or heirs,
and shall be valid and binding upon the Pledgee and each of its successors, heirs or
permitted assignees.
	 
	 	9.3	 	The Pledgee may, at any time and to the extent permitted by laws, transfer all
or any of its rights and obligations under the Master Contract to any person designated
by it (natural person/legal person), in which case, the assignee shall be entitled to
and undertake all rights and obligations of the Pledgee hereunder as if it should have
been entitled to and undertaken such rights and obligations as a party to this
Contract. When the Pledgee transfers its rights and obligations under the Master
Contract, a written notice shall be only given by the Pledgee to the Pledgor, and the
Pledgor shall, at the request of the Pledgee, execute and transfer the relevant
contracts and/or documents in this regard.

 

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	 	9.4	 	A new pledge contract shall be signed between the new parties to the pledge
after the change of the pledgee as a result of the transfer.

	10.	 	Effectiveness
	 
	 	 	This Contract is signed and shall become effective on the date first written above.

	11.	 	Termination
	 
	 	 	This Contract shall be terminated after the Secured Debt under the Master Contract has been
fully repaid and the Pledgor has no longer undertaken any obligation under the Master
Contract, and the Pledgee shall, within the earliest reasonable and practicable time, offer
assistance to complete necessary formalities so as to release the pledge of the Equity
Interest.

	12.	 	Handling Fees and Other Costs

	 	12.1	 	All costs and actual expenses in connection with this Contract, including
without limitation, legal fee, cost of production, stamp duty and any other taxes and
charges, shall be borne by the Pledgor. If the relevant taxes are required by law to
be paid by the Pledgee, the Pledgor shall fully indemnify the Pledgee such taxes paid
by it.
	 
	 	12.2	 	If the Pledgor fails to pay any taxes or charges payable in accordance with
this Contract or the Pledgee recovers such taxes or charges by any means or ways due to
any other reasons, the Pledgor shall bear all costs arising therefrom (including
without limitation, all taxes, handling fees, management fees, litigation cost,
attorney’s fees and various insurance premiums in connection with the handling of the
Pledge Right).

	13.	 	Force Majeure

	 	13.1	 	“Force Majeure” means any event that is beyond the reasonable control of a
party and that is unavoidable even though the party so affected gives reasonable
attention to it, including but not limited to act of government, act of nature, fire,
explosion, typhoon, flood, earthquake, tidal, lightning or war. However, the shortage
of credit, capital or financing shall not be deemed as events beyond the reasonable
control of a party. Any party who is affected by “Force Majeure” shall notify the
other party as soon as possible of the event, in respect of which the exemption from
such obligations is sought.

 

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	 	13.2	 	When the performance of this Contract is delayed or prevented due to the “Force
Majeure” defined above, the party so affected shall not be required to assume any
liabilities hereunder to the extent that it is within the scope of the delay or
prevention. It shall take appropriate measures to minimize or eliminate the impact of
“Force Majeure” and shall make effort to resume the performance of any obligations that
are delayed or prevented by the “Force Majeure”. Once the “Force Majeure” is removed,
the parties agree to resume the performance of their respective obligations hereunder
with their greatest efforts.

	14.	 	Confidentiality Obligation
	 
	 	 	The parties hereto acknowledge and confirm that any oral or written information exchanged
between them in connection with this Contract shall be confidential information. The
parties shall keep all such information confidential and shall not disclose any of the
information to any third parties without the written consent of the other parties, except
for the following: (a) the information that are or will be known to the public (provided
that they are not disclosed to the public without authorization by the information receiving
party); (b) the information required to be disclosed by applicable laws, or the rules or
regulations of securities exchanges; or (c) the information required to be disclosed by a
party to its legal or financial advisors with respect to the transaction mentioned herein,
for which such legal or financial advisors shall also comply with the confidentiality
obligation as similar as that described in this Article. Any divulgence of Confidential
Information by the employees of either party or any organization engaged by it shall be
deemed as the divulgence of Confidential Information by such party, and such party shall be
liable for the breach pursuant to this Contract.

	15.	 	Dispute Resolution

	 	15.1	 	This Contract shall be governed by and construed in accordance with the laws of
the PRC;
	 
	 	15.2	 	Any disputes between the parties arising from the interpretation and
performance of any provisions hereof shall be resolved in good faith by them through
consultation. If no agreement can be reached in respect of a dispute, either party may
submit such dispute to China International Economic and Trade Arbitration Commission
for arbitration in accordance with its arbitration rules then in force. The seat of
arbitration shall be Beijing. The arbitration shall be conducted in Chinese. The
arbitral award shall be final and binding upon the parties.

	16.	 	Integrity of this Contract
	 
	 	 	Notwithstanding the requirement in Article 10 hereof, the parties confirm that, once this
Contract becomes effective, it shall constitute the entire agreement and understanding
between the parties hereto with respect to the contents of this Contract, and shall
completely supersede all previous oral or/and written discussions, communications,
understanding, agreements and arrangements between the parties hereto in connection with the
contents of this Contract.

	17.	 	Severability of this Contract
	 
	 	 	If any provision of this Contract is invalid or unenforceable due to its inconsistency with
the relevant laws, such provision shall be deemed to be invalid only to the extent within
the scope of the related jurisdiction, and shall not affect the legal effect of the other
provisions hereof.

 

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Party A: Aero Biotech Science & Technology Co., Ltd.

Legal Representative/Authorized Representative: /s/ Huang Hua 

Common Chop: [Chop of Aero Biotech Science & Technology Co., Ltd. is affixed]

Party B: Huang Hua

Signature: /s/ Huang Hua 

Party C: Taiyuan Primalights III Agriculture Development Co., Ltd.

Legal Representative/Authorized Representative:

Common Chop: [Chop of Taiyuan Primalights III Agriculture Development Co., Ltd. is affixed]

 

10Exhibit 4.52

Exhibit 4.52

English Translation for Reference

EXCLUSIVE CALL OPTION CONTRACT

This Exclusive Call Option Contract (hereinafter referred to as “this Contract”) is made on June
30, 2008 in Beijing:

BY AND AMONG:

Party A: Aero Biotech Science & Technology Co., Ltd.

Address: Block 16, No. 26 Court, Xihuan South Road, Economic and Technological Development Zone,
Beijing

Party B: Huang Hua, ID card number: 110108196204292252;

Party C: Taiyuan Primalights III Agriculture Development Co., Ltd. (hereinafter also referred to
as “P3A”)

Address: Middle Area of Highway 73, Zhuang Er Shang Village, Huang Ling Rural Area, Xiaodian
District, Taiyuan

WHEREAS:

	1.	 	Party A is a wholly foreign-owned enterprise incorporated in the People’s Republic of China
(hereinafter referred to as the “PRC”, and for the purpose of this Contract, excluding the
Hong Kong Special Administrative Region, Macao Special Administrative Region and Taiwan) under
the laws of the PRC;

	 
	2.	 	Party C is a limited liability company incorporated and validly existing in Taiyuan, Shanxi
Province, the PRC;

	 
	3.	 	Party B is a citizen of the PRC, who holds 40% equity interest of P3A;

	 
	4.	 	Party B intends to grant to Party A an exclusive call option so that Party A may request
Party B to sell his equity interest to it upon certain conditions are satisfied.

NOW, THEREFORE, IT IS AGREED as follows after mutual consultation:

CHAPTER
1 SALE AND PURCHASE OF EQUITY INTEREST

	1.1	 	Grant of Option

	 
	 	 	Party B hereby irrevocably grants to Party A an option to purchase or designate any person
or persons (hereinafter referred to as the “Designated Person”) to purchase from Party B all
or part of his equity interest in P3A at any time according to the steps for exercise of the
option as determined by Party A at its sole discretion to the extent permitted by the PRC
laws and at the price specified in Article 1.3 hereof (hereinafter referred to as the “Call
Option”). Except for Party A and/or the Designated Person, Party B shall not sell, offer to
sell, transfer, offer as gift nor pledge any equity interest of P3A to any other third
parties. P3A hereby agrees to the grant of the Call Option by Party B to Party A and/or the
Designated Person. The term “person” specified in this Article and this Contract shall
include individuals, corporations, joint ventures, partnerships, enterprises, trusts or
non-corporate bodies.

 

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	1.2	 	Steps for Exercise of the Call Option

	 
	 	 	Subject to the provisions of the PRC laws and regulations, Party A and/or the Designated
Person may exercise the Call Option by giving written notice to Party B (hereinafter
referred to as the “Equity Purchase Notice”) and specifying the portion of equity interest
to be purchased from Party B (hereinafter referred to as the “Purchased Equity”) and the
manner in which the purchase is made.

	1.3	 	Purchase Price

	 	1.3.1	 	When Party A exercises its Call Option, unless an appraisal is required to be
made in respect of the equity interest by applicable PRC laws and regulations then in
effect or there are other restrictions imposed by such PRC laws and regulations on the
price of equity interest, the purchase price payable by Party A to Party B in respect
of all of the equity interest of P3A (hereinafter referred to as the “Purchase Price”)
shall be RMB One (1).

	 
	 	1.3.2	 	If an appraisal is required to be made in respect of the equity interest by
the PRC laws and regulations that are applicable at the time when Party A exercises its
Call Option or there are other restrictions imposed by such PRC laws and regulations on
the price of equity interest, the parties agree that the Purchase Price shall the
minimum price permitted by applicable laws.

	 
	 	1.3.3	 	If Party A chooses to purchase part of the equity interest, the exercise price
of the Call Option shall be adjusted according the ratio of the Purchased Equity to the
whole equity interests of P3A.

	1.4	 	Transfer of the Purchased Equity

	 
	 	 	For each exercise of the Call Option:

	 	1.4.1	 	Party B shall cause P3A to hold a Party Bs’ meeting in a timely manner, during
which a resolution approving the transfer of equity interest by Party B to Party A
and/or the Designated Person shall be passed and he shall procure other Party Bs to
give up their right of first refusal in respect of the Purchased Equity in writing;

	 
	 	1.4.2	 	Party B shall sign an equity transfer contract in relation to each transfer
with Party A and/or the Designated Person (as applicable) in accordance with the
requirements of this Contract and the Equity Purchase Notice in connection with the
Purchased Equity;

	 
	 	1.4.3	 	The relevant parties shall execute all other necessary contracts, agreements
or documents, obtain all necessary government approvals and consents, and take all
necessary actions to grant the valid ownership of the Purchased Equity to Party A
and/or the Designated Person without any security interest being attached thereto and
procure Party A and/or the Designated Person to become the legal owner of the Purchased
Equity. For the purpose of this Article and this Contract, “security interest” shall
include guarantees, mortgages, pledges, third parties’ rights or interests, any share
options, acquisition rights, right of first refusal, right to offset, ownership
retention or other security arrangements.

	1.5	 	Payment

	 
	 	 	The payment method of the Purchase Price or the exercise price of the Call Option shall be
determined by Party A and/or the Designated Person and Party B through negotiation in
accordance with the laws applicable at the time when the Call Option is exercised.

CHAPTER 2 UNDERTAKINGS RELATING TO EQUITY INTEREST

	2.1	 	Undertakings relating to P3A

	 
	 	 	Party B and Party C hereby jointly undertake as follows:

 

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	 	2.1.1	 	Without the prior written consent of Party A, they shall not in any manner
supplement, change or amend the articles of association of P3A, increase or decrease
its registered capital, or otherwise change the structure of its registered capital;

	 
	 	2.1.2	 	P3A shall maintain its corporate existence in accordance with good financial
and business standards and practices by operating its business and handling its affairs
in a prudent and efficient manner; it shall make its best endeavour to ensure that P3A
continues to own all permits, licenses and approvals that are necessary for its
operation and that such permits, licenses and approvals will not be cancelled; it shall
make its best endeavour to keep the current organizational structure and the senior
management of the company unchanged, and to maintain the relationship with its
customers so as to guarantee that there will not be any material adverse effect on the
goodwill and operation of P3A after the delivery of equity interest as agreed;

	 
	 	2.1.3	 	Without the prior written consent of Party A, P3A shall not, at any time after
the date hereof, sell, transfer, mortgage or otherwise dispose of the legal or
beneficial interest in any assets, businesses or revenues of P3A, nor allow any other
security interest to be created thereon;

	 
	 	2.1.4	 	Without the prior written consent of Party A, P3A shall not incur, inherit,
guarantee or allow the existence of any debt, except for (i) debts incurred in the
normal or ordinary course of business other than through loans; and (ii) debts
disclosed to Party A for which Party A’s written consent has been obtained;

	 
	 	2.1.5	 	P3A shall always operate all of its businesses during the ordinary course of
business to maintain its asset value, and shall refrain from any action/omission that
may affect its business operation and asset value;

	 
	 	2.1.6	 	Without the prior written consent of Party A, P3A shall not enter into any
material contract, except for those contracts that are entered into in the ordinary
course of business (for the purpose of this paragraph, a contract with a value
exceeding RMB One Million (1,000,000) shall be deemed as a material contract);

	 
	 	2.1.7	 	Without the prior written consent of Party A, P3A shall not provide any loan
or credit to any person;

	 
	 	2.1.8	 	P3A shall, at the request of Party A, provide it with information relating to
the business operation and financial condition of P3A;

	 
	 	2.1.9	 	P3A shall take out and maintain insurance from an insurance company recognized
by Party A. The coverage and type of insurance shall be the same as those of the
insurance typically taken out by other companies that operate businesses similar to P3A
in the same region and possess property or assets similar to P3A;

	 
	 	2.10	 	Without the prior written consent of Party A, P3A shall not merge or
consolidate with, or acquire or invest in any person;

	 
	 	2.1.11	 	P3A shall immediately notify Party A of the occurrence or possible occurrence of any
litigation, arbitration or administrative proceedings relating to P3A’s assets,
businesses and revenues;

	 
	 	2.1.12	 	To maintain the ownership by P3A of all of its assets, it shall execute all necessary
or appropriate documents, take all necessary or appropriate actions and make all
necessary or appropriate claims or raise necessary and appropriate defenses against all
claims;

 

3

 

	 	2.1.13	 	Without the prior written consent of Party A, P3A shall not in any manner distribute
dividends to its Party Bs, provided that upon Party A’s written request, it shall
immediately distribute all or part of its distributable profits to its Party Bs;

	 
	 	2.1.14	 	Within the term hereof, P3A shall operate its business in compliance with all
applicable laws, regulations, administrative rules and regulations of the PRC, and
there will not be any material adverse effect on the business operation or assets of
P3A due to any breach of the above requirements;

	 
	 	2.1.15	 	If Party A exercises the Call Option according to the conditions of this Contract,
P3A shall make its best endeavour to obtain all government approvals and other consents
(if applicable) that are necessary for the completion of the equity transfer as soon as
possible;

	 
	 	2.1.16	 	At the request of Party A, they shall appoint any persons designated by Party A as
directors of P3A.

	2.2	 	Undertakings relating to Party B

	 
	 	 	Party B hereby undertakes that:

	 	2.2.1	 	Without the prior written consent of Party A, he will not, at any time after
the date hereof, sell, transfer, mortgage or otherwise dispose of any legal or
beneficial interest in the equity interest, nor allow any other security interest to be
created thereon, except for the pledge right under the Equity Pledge Contract;

	 
	 	2.2.2	 	Without the prior written consent of Party A, he will not vote in favor of or
support or execute any Party Bs’ resolution at a Party Bs’ meeting of P3A to approve
the sale, transfer, mortgage or disposal in any other manner of any legal or beneficial
interest in the equity interest, nor allow any security interest to be created thereon,
except for the same is made to Party A or any person designated by it;

	 
	 	2.2.3	 	Without the prior written consent of Party A, he will not vote in favor of or
support or execute any Party Bs’ resolution at a Party Bs’ meeting of P3A to approve
the merger or consolidation of P3A with any person, or the acquisition of or investment
in any person;

	 
	 	2.2.4	 	He will immediately notify Party A of the occurrence or possible occurrence of
any litigation, arbitration or administrative proceedings relating to the equity
interest held by him;

	 
	 	2.2.5	 	He will procure the Party Bs’ meeting of the company to vote in favor of the
transfer of the Purchased Equity as set forth in this Contract;

	 
	 	2.2.6	 	To maintain his ownership in the equity interest, he will execute all
necessary or appropriate documents, take all necessary or appropriate actions and make
all necessary or appropriate claims or raise necessary and appropriate defenses against
all claims;

	 
	 	2.2.7	 	At the request of Party A, he will appoint any persons designated by Party A
as directors of P3A;

	 
	 	2.2.8	 	At the request of Party A at any time, he will unconditionally and promptly
transfer his equity interest to Party A and/or the Designated Person at any time, and
give up his right of first refusal in respect of other equity interests to be
transferred;

 

4

 

	 	2.2.9	 	He will strictly observe the provisions of this Contract and other contracts
jointly or separately executed by and among Party B, P3A and Party A, perform his
obligations hereunder and thereunder, and refrain from action/omission that may affect
the effectiveness and enforceability thereof.

CHAPTER 3 REPRESENTATIONS AND WARRANTIES

Party B and P3A hereby represent and warrant to Party A as of the date hereof and each date of
transfer:

	3.1	 	They have the right to execute and deliver this Contract and any equity transfer contracts to
which they are a party and which are entered into in respect of each transfer of the Purchased
Equity hereunder (each, a “Transfer Contract”), and to perform their respective obligations
under this Contract and any Transfer Contracts. This Contract and the Transfer Contracts to
which they are a party, once executed, will constitute their legal, valid and binding
obligations and shall be enforceable against them in accordance with the provisions thereof;

	 
	3.2	 	The execution and delivery of this Contract or any Transfer Contracts and the performance of
their respective obligations under this Contract or any Transfer Contracts shall not: (i)
result in any violation of any applicable PRC laws and regulations; (ii) be in conflict with
their articles of association or other constituent documents; (iii) result in the violation of
any contracts or documents to which they are a party or which are binding upon them, or
constitute any breach under any contracts or documents to which they are a party or which are
binding upon them; (iv) result in the violation of any conditions for the grant and/or
continued effectiveness of any licenses or permits issued to either of them; or (v) result in
the suspension or revocation of or imposition of additional conditions to any licenses or
permits issued to either of them;

	 
	3.3	 	P3A has a good and merchantable title to all of its assets. P3A has not created any security
interest on its assets;

	 
	3.4	 	P3A does not have any outstanding debts, except for (i) debts incurred in the ordinary course
of its business, and (ii) debts disclosed to Party A for which Party A’s written consent has
been obtained;

	 
	3.5	 	P3A has complied with all PRC laws and regulations applicable to the acquisition of assets;

	 
	3.6	 	There are no ongoing, pending or threatened litigation, arbitration or administrative
proceedings relating to P3A or the equity interest in or assets of P3A; and

	 
	3.7	 	Party B has a good and merchantable title and a complete and valid disposal right to all of
his equity interests (except for the restrictions under the PRC laws and regulations). Save
for the security interests under the Equity Pledge Contract, he has not created any security
interest on his equity interest and is free from any third party claims.

CHAPTER 4 ASSIGNMENT OF THIS CONTRACT

	4.1	 	Unless with the prior written consent of Party A, Party B and P3A shall not transfer their
respective rights and obligations hereunder to any third parties.

 

5

 

	4.2	 	Party B and P3A hereby agree that Party A shall have the right to transfer its rights and
obligations hereunder to any third parties when necessary. Party A shall only be required to
serve written notice to Party B and P3A when such transfer is made, and no consent shall be
further required from Party B or P3A in respect of such transfer.

CHAPTER
5 EFFECTIVENESS AND TERM

	5.1	 	This Contract shall become effective as of the date first written above.

	 
	5.2	 	This Contract shall be automatically terminated only after Party A exercises its option to
purchase all of the equity interests in P3A pursuant to the requirements of this Contract,
except for the early termination by this Contract or pursuant to the provisions of the
relevant agreements separately signed by the parties hereto.

	 
	5.3	 	If, during the period stipulated in Article 5.2, the operation term of Party A or P3A
(including any extended term) expires or either party terminates due to other reasons, this
Contract shall be terminated at the time of the termination of such party, except for the
circumstances where Party A has transferred its rights and obligations pursuant to Article 4.2
hereof.

CHAPTER
6 APPLICABLE LAWS, DISPUTE RESOLUTION AND LIABILITIES FOR BREACH

	6.1	 	Applicable Laws

	 
	 	 	The formation of this Contract, its effectiveness, interpretation and performance, as well
as the dispute resolution hereunder shall be protected and governed by the laws of the PRC.

	6.2	 	Dispute Resolution

	 
	 	 	Any disputes between the parties arising from the interpretation and performance of any
provisions hereof shall be resolved in good faith by them through consultation. If no
agreement can be reached within thirty (30) days after a Party proposes to resolve a dispute
through consultation, either party may submit such dispute to China International Economic
and Trade Arbitration Commission for arbitration in accordance with its arbitration rules
then in force. The seat of arbitration shall be Beijing. The arbitration shall be
conducted in Chinese. The arbitral award shall be final and binding upon the parties.

	6.3	 	Liabilities for Breach

	 
	 	 	A breach of this Contract shall be constituted if any party hereto violates the requirements
of this Contract by failing to fully perform this Contract, or making any false information,
or withholding or omitting significant facts in any undertaking, representation and warranty
made by him/it in this Contract, or refusing to perform any of his/its undertakings,
representations and warranties. The defaulting party shall bear the corresponding
liabilities for the breach according to laws.

 

6

 

CHAPTER 7 TAXES AND FEES

Party A shall bear any and all transfer and registration tax and fees incurred by or levied on any
party in accordance with the laws of the PRC in connection with the preparation and execution of
this Contract and the Transfer Contracts, as well as the consummation of the transactions
contemplated under this Contract and the Transfer Contracts.

CHAPTER 8 CONFIDENTIALITY OBLIGATION

The parties hereto acknowledge and confirm that any oral or written information exchanged between
them in connection with this Contract shall be confidential information. The parties shall keep
all such information confidential and shall not disclose any of the information to any third
parties without the written consent of the other parties, except for the following:

	 	a.	 	the information that are or will be known to the public (provided that they are
not disclosed to the public without authorization by the information receiving party);

	 
	 	b.	 	the information required to be disclosed by applicable laws, or the rules or
regulations of securities exchanges; or

	 
	 	c.	 	the information required to be disclosed by a party to its legal or financial
advisors with respect to the transaction mentioned herein, for which such legal or
financial advisors shall also comply with the confidentiality obligation as similar as
that described in this Article. Any divulgence of confidential information by the
employees of either party or any organization engaged by it shall be deemed as the
divulgence of confidential information by such party, and such party shall be liable
for the breach pursuant to this Contract. This article shall survive regardless of
whether this Contract is invalid, discharged, terminated or cannot be operated due to
any reason.

CHAPTER 9 FURTHER ASSURANCE

The parties agree to promptly execute such documents and take such further action as are reasonably
required for or are conducive to the implementation of the provisions and purpose of this Contract.

CHAPTER
10 MISCELLANEOUS

	10.1	 	Modification, Amendment and Supplement

	 
	 	 	All amendments and supplements to this Contract shall be made by the parties in writing.
Any amendment contracts and supplemental contracts hereto duly signed by the parties shall
be an integral part of this Contract, and shall have the same legal effect as this Contract.

	 
	10.2	 	Integrity of this Contract

	 
	 	 	The parties confirm that, once this Contract becomes effective, it shall constitute the
entire agreement and understanding between the parties hereto with respect to the contents
of this Contract, and shall completely supersede all previous oral or/and written agreement
and understanding between the parties hereto in connection with the contents of this
Contract.

	 
	10.3	 	Severability of this Contract

	 
	 	 	If any provision or provisions of this Contract is/are held to be invalid, illegal or
unenforceable in any respect in accordance with any laws or regulations, the validity,
legality or enforceability of the remaining provisions of this Contract shall not be
affected or impaired in any respect. The parties shall, through amicable negotiations,
strive to replace those invalid, illegal or unenforceable provision or provisions with valid
provision or provisions, and the economic effect of such valid provision or provisions shall
be as close as possible to the economic effect of those invalid, illegal or unenforceable
provision or provisions.

 

7

 

	10.4	 	Headings

	 
	 	 	The headings of this Contract are for convenience only, and shall not be used to interpret,
explain or otherwise affect the meanings of the provisions of this Contract.

	 
	10.5	 	Language and Counterpart

	 
	 	 	This Contract is executed in Chinese in nine originals and each of them shall have the same
legal effect. Each party shall keep one original and the remaining three originals shall be
provided to the relevant government departments.

	 
	10.6	 	Successors

	 
	 	 	This Contract shall be binding on and shall inure to the interest of the respective
successors or heirs of the parties and the permitted assignees of such parties.

	 
	10.7	 	Survival

	 
	 	 	Any obligations that occur or are due as a result of this Contract prior to the expiration
or early termination of this Contract shall survive the expiration or early termination
hereof. The provisions of Chapters 6, 8 and 9 and this Article 10.7 hereof shall survive
the termination of this Contract.

	 
	10.8	 	Waivers

	 
	 	 	Any party may waive the terms and conditions of this Contract, provided that such a waiver
must be provided in writing and shall require the signatures of the parties. No waiver by
any party in certain circumstances with respect to a breach by other parties shall operate
as a waiver by such a party with respect to any similar breach by other parties in other
circumstances.

IN WITNESS WHEREOF, the parties hereto have executed this Contract on the day first above written.

[No text below]

 

8

 

[No text in this page]

Party A: Aero Biotech Science & Technology Co., Ltd.

Legal Representative/Authorized Representative: /s/ Huang Hua 

Common Chop: [Chop of Aero Biotech Science & Technology Co., Ltd. is affixed]

Party B: Huang Hua

Signature: /s/ Huang Hua 

Party C: Taiyuan Primalights III Agriculture Development Co., Ltd.

Legal Representative/Authorized Representative:

Common Chop: [Chop of Taiyuan Primalights III Agriculture Development Co., Ltd. is affixed]

 

9

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