Exhibit 10.15


 


Loan Guaranty Agreement


 


This contract is entered into
by and between the creditor and the guarantor on an equal and voluntary basis according to law. In order to safeguard the legitimate rights
and interests of the guarantor, the creditor hereby requests the guarantor to pay full attention to all the provisions concerning the
rights and obligations of both parties, especially the contents in bold type.


 






     


     


    

 


Creditor: Industrial
and Commercial Bank of China, Tahe Branch (hereafter referred to Party A)


 


Legal representative: Linqing
Wang


 


Address: No. 49, Jianshe
Avenue, Tahe Town


 


Telephone: [*]                         


 


Guarantor: CN
Energy Industrial Development (hereafter referred to Party B)


 


Legal representative: Guolong
Wang


 


Address: No. 327, Green
Valley Avenue, Shuige Industrial Park, Liandu District, Lishui City, Zhejiang Province


 


Zip code: 323000


 


Telephone: [*]                         


 


Contact person: Jinwu Huang


 


Phone number: [*]                         


 


Party B acts as the guarantor.
After negotiation on an equal basis, both parties make the following contract to abide by according to relevant laws and statutes.


 


Article 1 Guaranteed
Principle Claim


 


The creditor's right guaranteed by Party B is
the creditor's right against the debtor based on the main contract (Name: Small Business Loan Agreement, Number: [*]) signed with Party
A on June 18, 2021.


 


Article 2
Guarantee Method


 


Party B assumes the responsibility of guarantee
by joint and several liability guarantee.


 


Article 3
Guarantee Scope


 


Party B guarantee scope includes: principle, interest,
penalty interest, liquidated damages, etc.


 






     


     


    

 


Article 4 Guarantee Period


 


The guarantee period of this contract: Two years
from the loan maturity date. During the guarantee period, the creditor has right to request debtor to undertake guarantee liability based
on the whole or part of principle claim.


 


Article 5 Party B Promise and Statements


 


The statements and promises will be as follows:


 


5.1 The guarantor is legally qualified to be a
guarantor, providing Party A with guaranty in accordance with the articles of the company by obtaining all the mandatory authorizations
or entrustment, without violating any law, regulations or other relevant stipulations.


 


5.2 If the company is a public company or its
subsidiary, the guarantor shall disclose the relevant information in accordance with the capital market law and exchange listing regulations.


 


5.3. The guarantor has the full capacity to take
the responsibility of the guaranty, and will not be affected by any instructions, changes in financial circumstances, or any contract
signed with a third party that reduces or exempts the guarantor’s responsibilities.


 


5.4 The guarantor fully understands the loan use
under the agreement, provides guaranty to the creditor voluntarily, and finds the content of the agreement true. With regard to domestic
and international trade financing, the guarantor confirms that the basis of the financing is true and no fraud exists.


 


5.5 All the documents provided by guarantor must
be real, accurate, complete and effective;


 


5.6 If the principal creditor’s right guaranteed
by this agreement is to provide Party A with international trade financing, the guarantor accepts and approves the relevant international
conventions of the business.


 


5.7 Guarantor conceals no major liabilities before
the cut-off date of the contract from creditor.


 






     


     


    

 


Article 6 Party B Commitment


 


Party B makes the following commitment to Party
A:


 


6.1 If any one of the following situations occurs,
under Party A’s requests, the Party B shall unconditionally perform the guaranty duty under this agreement:


 


		A.	Debtor fails to make full repayment on or before the principal creditor’s right matures;



 


		B.	Party B or the debtor files for bankruptcy, or closes, dissolves, liquidates, suspends its business, or
gets its business license revoked or canceled.



 


6.2 If Party A’s creditor rights are guaranteed
by property, regardless of whether the guaranty is provided by the debtor or third party, Party A has the right to request Party B take
the guaranty responsibility first in the order, and Party B shall not dispute this request. If Party A waive, change, or lose other guaranty
rights, Party B’s guaranty responsibility shall still be effective and shall not be thereby ineffective or reduced.


 


6.3 Party B shall provide relevant documents requested
by Party A, including financial documents, tax return, or other documents that reflect Party B’s financial status.


 


6.4 If any one of the following situations occurs,
Party B shall continue to exercise its duty of guarantor pursuant to this agreement and there is no need to obtain Party B’s consent:


 


		A.	The main loan agreement between Party A and the debtor is changed pursuant to their negotiations, which
does not increase or extend the debtor’s obligation;



 


		B.	In the process of domestic or international financing, Party A and the debtor change the credit proof
of the main loan agreement, which does not increase or extend the debtor’s obligation;



 


		C.	The amount of debt changes due to fluctuations in the floating exchange rate or LPR adopted by the main
loan agreement;



 


		D.	Party A transfers the creditor’s right to a third party.



 


6.5 Party B shall not provide guaranty to a third
party that will harm the interest of Party A.


 


6.6 In case of any merger, spin-off, capital reduction,
stock transfer, stock pledge, major transfer of capital and debtor, major foreign investment, material increase in debt financing or other
activity that could cause negative impact on Party A’s rights, Party B shall obtain Party A’s written consent or make satisfying
arrangements under the guaranty agreement, otherwise it shall not engaged in the above activities.


 


6.7 If any of the following situation occurs,
Party B shall notify Party A in a timely manner:


 


		A.	Any change in articles of the corporation, operating scope, registered capital, legal representative,
or stock rights;



 






     


     


    

 


		B.	Shutdown, dissolution, liquidation, suspension, being suspended business license, being revoked or filing
for bankruptcy;



 


		C.	Involvement with any potential major business disputes, litigation, arbitration or seizure of the property;



 


		D.	If Party B is a natural person, any change in residence, employment, contact or others;



 


6.8 Party B shall make timely receipt of Party
A’s written notice.


 


6.9 Party B shall exercise its duty regarding
letter of credit in a responsible way.


 


6.10 Under clauses of shipping guarantee, endorsement
of lading bill, or authorizing shipping business, Party B shall not dispute or reject the debtor’s nonpayment of letter of credit.


 


Article 7 Party A Commitment


 


Without the written consent of Party C, Party
B cannot transfer the authorities and liabilities of the contract to a third party. With the written consent of Party C, Party B can transfer
the authorities and liabilities of the contract to a third party, which should abide by the clauses of the contract unconditionally.


 


Article 8 Event of Default


 


Event of default is as follows:


 


8.1 Does not perform the guarantee liabilities
of contract on schedule;


 


8.2 The statements in contract are not real, or
do not fulfill the commitments in contract;


 


8.3 Violate other agreements about rights and
obligations of the parties;


 


Article 9
Alteration of the Contract


 


After the effectiveness of the contract, no party
can alter or cancel the contract without other's consent. In case of alteration or cancellation, the party should notice others in written
form a month in advance, and sign the alteration agreement legally.


 






     


     


    

 


Article 10
Resolutions of Disputes


 


10.1 The items excluding the contract should be
handled according to the laws, statutes and financial regulations.


 


10.2 All the disputes should be negotiated first.
If the Parties fail to reach resolutions, then the 1st measure would be taken:


 


i. Sue to the People's Court of Party
B's Location.


 


ii. Submit to                  arbitration
committee.


 


Article 11 Confirmation of Addresses for


 


Sending Documents of Litigation or Arbitration


 


11.1 Party B confirms that the address recorded
on the first page of this agreement is the delivery address for litigation or arbitration document. Litigation or arbitration document
includes but is not limited to notice, announcement of court session, judgment, arbitration, resolution, notice of time limit, etc.


 


11.2 Party B agrees that the arbitration institution
or the court may use the fax, email recorded on first page of this agreement for the purpose of sending arbitration or litigation
documents, excluding judgment, arbitration, and resolution.


 


11.3 The above delivery also applies to the first
trial, second trial, appeal and execution of the arbitration and litigation procedures during each phase. Regarding the above delivery
address, the arbitration institution or the court may deliver by mail.


 


11.4 Party B shall ensure that the address, contact,
fax, email address and other information on this agreement are true and valid. If any relevant information changes, Party B shall notify
Party A by written notice, otherwise the original information shall be deemed as effective and Party B shall voluntarily take responsibility
for the legal consequence.


 


Article 12
Other


 


This Loan Contract has two originals, which are
identical to each other, with each of the parties holding one copy. There are several duplicates for future reference.


 


Party A : /s/ Industrial and Commercial Bank of China Limited
- Tahe Branch


 


Signing date: June 18, 2021


 






     


     


    

 


Party B: /s/ CN Energy Industrial Development


 


Signing date: June 18, 2021