Document:

EX-10.15

 Exhibit 10.15 

Power of Attorney 
 I, WU
Jiajun, a PRC citizen with identity card number of ***, have executed this POWER OF ATTORNEY on May 20, 2020. This Power of Attorney shall take effect from the date of execution. I own 100% of the entire registered capital of Shanghai Zhangshi
Education Training Co., Ltd. . (hereinafter referred to as “ Shanghai Zhangshi” or the “Company”) as of the date hereof. 

In respect of equity interests held by me in Shanghai Zhangshi now and in the future (hereinafter referred to as “My Equity
Interests”), I hereby irrevocably authorize Shanghai Zhangxue Education Technology Co., Ltd. (hereinafter referred to as “WFOE”) or such person as it may designate at its sole discretion (including successors thereof,
including liquidators (if relevant, in place of the WFOE) to act as my exclusive agent and attorney during the term of this Power of Attorney, to exercise on my behalf all the rights under relevant laws and regulations and the Articles of
Association in respect of My Equity Interests, including without limitation to the following rights (collectively, the “Shareholder Rights”): 
  

	 	(a)	 To propose the holding, convening and attending shareholders’ meetings of the Company;

  

	 	(b)	 To receive any notices of convening of shareholders’ meetings and relevant proceedings;

  

	 	(c)	 To execute and deliver in my name and on my behalf as a Shareholder any written resolutions;

  

	 	(d)	 To vote, whether in person or by proxy, on any matters discussed at the shareholders’ meeting (including
but not limited to the sale, transfer, mortgage, pledge or disposition of any or all assets of the Company); 

  

	 	(e)	 To sell, transfer, pledge or otherwise dispose of any or all of my equity interests in the Company;

  

	 	(f)	 To nominate, elect, designate or appoint or remove legal representative, directors, general manager, chief
financial officer, supervisor and other senior officers of the Company; 

  

	 	(g)	 To supervise the Company’s operating performance; To approve annual budget or declare dividends, and
access to financial information of the Company at any time; 

  

	 	(h)	 To execute and deliver in the name and on behalf of the Shareholder any written resolutions and minutes;

  
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	 	(i)	 To approve the filing of any registration documents by the Company with any governmental authorities;

  

	 	(j)	 To exercise voting rights on behalf of the Shareholder on the liquidation of the Company;

  

	 	(k)	 To initiate shareholder action or take other legal actions against any director or officer of the Company who
acts in a manner which is detrimental to the interests of the Company or its Shareholders; 

  

	 	(l)	 To approve any amendment to the Articles of Association of the Company; and 

 

	 	(m)	 To exercise any other rights granted to the Shareholder under the Articles of Association of the Company or
applicable laws and regulations. 

 I hereby further agree and undertake that: 

Without limiting the generality of the powers granted hereunder, WFOE has the power to, on behalf of myself, execute all the documents I shall
sign as stipulated in the Exclusive Option Agreement dated May 20, 2020 among me, the WFOE, Shanghai Zhangshi and the Equity Pledge Agreement dated May 20, 2020 among me, the WFOE, Shanghai Zhangshi (including any modification, amendment
and restatement thereto, collectively the “Transaction Documents”), and perform the terms of the Transaction Documents on schedule. 

All the actions associated with My Equity Interests conducted by the WFOE shall be deemed as my own actions, and all the documents related to
My Equity Interests executed by the WFOE shall be deemed to be executed by me. I hereby acknowledge and ratify those actions and/or documents by the WFOE. All the actions taken by the WFOE with respect to My Equity Interests may be made by the WFOE
at its own discretion and without any oral or written instructions by me. 
 The WFOE is entitled to
re-authorize or assign its rights related to the aforesaid matters to any other person or entity at its own discretion and without giving prior notice to me or obtaining my consent. If required by PRC laws,
the WFOE shall designate a PRC citizen or other person or entity to exercise the aforementioned rights. As soon as the WFOE notifies me in writing that it assigns its rights under this Power of Attorney to a third party, I will withdraw all the
powers of attorney hereby made to the WFOE immediately and execute the form of this Power of Attorney immediately, to authorize and entrust others nominated by the WFOE in the same substance as this Power of Attorney. 

I hereby acknowledge, undertake and warrant that in the event of my death, disability or occurrence of any events that might affect my
exercise of shareholder rights in Shanghai Zhangshi, my heir, guardian or any other person who is entitled to claim rights or interests in the equity interests in Shanghai Zhangshi held by me shall be deemed to be a signing Party hereto and succeed
to all my rights and obligations under this Power of Attorney. 

  
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 I confirm that my spouse has executed the Transaction Documents and this Power of Attorney;
I and my spouse agree that the equity interests is my personal property and shall not constitute the joint property of me and my spouse; and My spouse agrees that I may deal with my equity interests alone without the consent of my spouse, and may
enjoy and perform my rights and obligations under the Transaction Documents and this Power of Attorney. In the event of divorce between myself and my spouse, the equity interests held by me in the domestic enterprises shall be deemed as my personal
property and shall not constitute the joint property of me and my spouse. I will take measures to ensure and perform the Transaction Documents and this Power of Attorney, and will not take any action against the Transaction Documents and this Power
of Attorney. 
 I undertake not to engage in any action contrary to the purpose or intent of the Transaction Documents and this Power of
Attorney or any action or omission that may result in conflict of interests between the WFOE and Shanghai Zhangshi or its subsidiaries; in the event of conflict of interests, I shall support the WFOE’s lawful interests and perform all
reasonable acts required by the WFOE. 
 During the period so long as I am a shareholder of Shanghai Zhangshi, this Power of Attorney shall
be irrevocable and continue to be effective, unless the WFOE indicates to the contrary in writing. 
 During the term of this Power of
Attorney, I hereby waive all the rights associated with My Equity Interests, which have been authorized to the WFOE through this Power of Attorney, and shall not exercise such rights by myself. 

The execution, effectiveness, construction, performance, amendment and termination of this Power of Attorney and the resolution of disputes
hereunder shall be governed by the laws of PRC. In the event of any dispute with respect to the construction and performance of this Power of Attorney, the signing Parties of this Power of Attorney shall first resolve the dispute through friendly
negotiations. In the event the Parties fail to reach an agreement on the dispute within thirty (30) days after either Party’s request to the other Parties for resolution of the dispute through negotiations, either Party may submit the
relevant dispute to the Shanghai International Economic and Trade Arbitration Commission for arbitration, in accordance with its Arbitration Rules. The arbitration shall be conducted in Shanghai, and the language used in arbitration shall be
Chinese. The arbitration award shall be final and binding on all Parties. 
 [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK] 

  
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 (Signature Page of Power of Attorney) 

 

			
	Signature:	 	 /s/ WU Jiajun

	Name: WU Jiajun

 Shanghai Zhangshi – Power of Attorney – Signature Page 

 Shanghai Zhangxue Education Technology Co., Ltd. hereby agrees and accepts this Power of Attorney:

 Shanghai Zhangxue Education Technology Co., Ltd. (Seal) 
  

	
	 /s/ Shanghai Zhangxue Education Technology Co., Ltd.

	Seal of Shanghai Zhangxue Education Technology Co., Ltd.

  

			
	Signature:	 	 /s/ ZHANG Yi

	Name: ZHANG Yi (张翼)
	Title: Legal Representative

 Shanghai Zhangshi Education Training Co., Ltd. hereby agrees and acknowledges this Power of Attorney: 

Shanghai Zhangshi Education Training Co., Ltd. (Seal) 
  

	
	 /s/ Shanghai Zhangshi Education Training Co., Ltd.

	Seal of Shanghai Zhangshi Education Training Co., Ltd.

  

			
	Signature:	 	 /s/ WU Jiajun

	Name: WU Jiajun (吴佳峻)
	Title: Legal Representative

 Shanghai Zhangshi – Power of Attorney – Signature PageEX-10.16

 Exhibit 10.16 

EQUITY PLEDGE AGREEMENT 

This Equity Pledge Agreement (“this Agreement”) has been executed by and among the following parties on May 20, 2020 in
Shanghai, the People’s Republic of China (“PRC” or the “PRC”): 
  

	Party A:  	 Shanghai Zhangxue Education Technology Co., Ltd. (the “Pledgee”), a limited
liability company established and existing under the laws of the PRC. The registered address is 1468E, Building 1, 196 Yangtai Road, Baoshan District, Shanghai 

 

	Party B:  	 WU Jiajun(the “Pledgor”), a PRC citizen with Chinese Identification Card No.:
*** 

  

	Party C:  	 Shanghai Zhangshi Education Training Co., Ltd. (the “Pledgee”), a limited
liability company established and existing under the laws of the PRC. The registered address is Room 202, 2 / F, 82 Tongjia Road, Hongkou District, Shanghai 

In this Agreement, each of Pledgee, Pledgor and Party C shall be referred to as a “Party” respectively, and they shall be collectively
referred to as the “Parties”. 
 Whereas: 
  

	1.	 As of the date of this Agreement, Pledgor holds 100 % equity interest in Party C. 

 

	2.	 Party C is a limited liability company registered in PRC. Party C acknowledges the respective rights and
obligations of Pledgor and Pledgee under this Agreement, and intends to provide any necessary assistance in registering the Pledge as defined below. 

  

	3.	 Pledgee is a wholly foreign-owned enterprise established and validly existing under the laws of PRC.

  

	4.	 To ensure that Party C and Pledgor fully perform their obligations under the Transaction Documents (as defined
below), Pledgor hereby pledges to the Pledgee all of the equity interest he or she holds in Party C as security for Party C’s and Pledgor’s performance of the Transaction Documents. 

NOW, THEREFORE, the Parties have mutually agreed to execute this Agreement upon the following terms. 

 

	1.	 Definitions 

Unless otherwise provided herein, the terms below shall have the following meanings: 

 

	 	1.1.	 Pledge: shall refer to the security interest granted by Pledgor to Pledgee pursuant to Article 2 of this
Agreement, i.e., the right of Pledgee to be compensated on a preferential basis with the conversion, auction or sales price of the Equity Interest. 

  
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	 	1.2.	 Equity Interest: shall refer to all of the equity interest lawfully now held and hereafter acquired by Pledgor
in Party C. 

  

	 	1.3.	 Term of Pledge: shall refer to the term set forth in Section 3 of this Agreement. 

 

	 	1.4.	 Transaction Documents: shall refer to the Exclusive Management Services and Business Cooperation Agreement
executed by and between Party C and Pledgee on May 20, 2020 (the “Business Cooperation Agreement”); the Exclusive Option Agreement executed by and among Party C, Pledgee and Pledgor on May 20, 2020 (the “Exclusive
Option Agreement”); Power of Attorney executed by and between Pledgor and Pledgee (the “Power of Attorney”) and any modification, amendment and restatement to the aforementioned documents. 

 

	 	1.5.	 Contract Obligations: shall refer to all the obligations of Pledgor under the Exclusive Option Agreement, the
Power of Attorney and this Agreement; and all the obligations of Party C under the Business Cooperation Agreement, the Exclusive Option Agreement and this Agreement. 

 

	 	1.6.	 Secured Indebtedness: shall refer to all the direct, indirect and derivative losses and loss of foreseeable
profits, suffered by Pledgee as a result of any Event of Default of Pledgor and/or Party C or the invalidity, cancellation or rescission of any Transaction Documents. The basis for the amounts of such losses includes but is not limited to the
reasonable business plan and profit forecast of Pledgee, the consulting and consulting fees payable to Pledgors under the Business Cooperation Agreement, all expenses occurred in connection with enforcement by Pledgee of Pledgors’ and/or Party
C’s Contract Obligations and etc. The Parties agree that the initial amount of the Secured Indebtedness under this Agreement shall be RMB2,520 million. During the term of validity of the Transaction Documents, Pledgee shall have the right
to require the adjustment of the Initial Registered Amount when necessary; Pledgor shall promptly complete the adjustment of the Initial Registered Amount and complete the registration procedures as required by Pledgee. 

 

	 	1.7.	 Event of Default: shall refer to any of the circumstances set forth in Section 7 of this Agreement.

  

	 	1.8.	 Notice of Default: shall refer to the notice issued by Pledgee in accordance with this Agreement declaring an
Event of Default. 

  

	2.	 Pledge 

  

	 	2.1.	 Pledgor hereby agrees to pledge to the Pledgee the Equity Interest which he lawfully owns and is entitled to
dispose of as security for the repayment of the Secured Indebtedness. Party C hereby assents that Pledgor pledges the Equity Interest to the Pledgee pursuant to this Agreement. 

  
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	 	2.2.	 The subject matter of pledge and specific amount of equity interest: The subject matter of pledge is all the
Equity Interest in the Company held by Pledgor, which corresponds to the registered capital of RMB1,000,000. 

  

	 	2.3.	 It is understood and agreed that the monetary valuation arising out of or relating to the Secured Indebtedness
shall be a variable and floating valuation until the Settlement Date (as defined below). 

  

	 	2.4.	 If any of the following events (each an “Event of Settlement”) occurs, the value of the
Secured Indebtedness shall be determined based on the total amount of the Secured Indebtedness that are due, outstanding and payable to Pledgee immediately prior to or on the date of occurrence of the Event of Settlement (the “Determined
Indebtedness”): 

  

	 	(a)	 Any other Transaction Documents are terminated in accordance with its relevant provisions;

  

	 	(b)	 The Event of Default set forth in Article 7 hereof occurs and fails to be resolved, as a result of which the
Pledgee gives a Notice of Default to the relevant Pledgors in accordance with Section 7.3; 

  

	 	(c)	 Upon due inquiry, Pledgee reasonably determines that Pledgors and/or Party C is insolvent or could potentially
be made insolvent; or 

  

	 	(d)	 Any other event that requires the determination of the Secured Indebtedness in accordance with relevant laws of
the PRC. 

  

	 	2.5.	 For the avoidance of doubt, the date on which an Event of Settlement occurs shall be the settlement date (the
“Settlement Date”). Pledgee shall have the right, at its option, to realize the Pledge in accordance with Article 8 of this Agreement on or after the Settlement Date. 

 

	 	2.6.	 The validity of the security hereunder shall not in any way be affected by any amendment or change of the
Transaction Documents. The security hereunder shall survive the obligations of Pledgor and Party C under the amended Transaction Documents. In the event that any Transaction Document becomes invalid, cancelled or rescinded due to any reason, Pledgee
shall have the right to immediately exercise the Pledge in accordance with Article 8 of this Agreement. 

  

	 	2.7.	 During the term of the Pledge, Pledgee is entitled to receive dividends distributed on the Equity Interest.
Without Pledgee’s prior written consent, Pledgor shall not receive dividends distributed on the Equity Interest. Dividends received by Pledgor on Equity Interest shall, upon the request of Pledgee, be (1) deposited into an account
designated and supervised by Pledgee and used to pay the Secured Indebtedness in priority; or (2) unconditionally donated to Pledgee or any other person designated by Pledgee at its sole discretion to the extent permitted under applicable laws
of the PRC. 

  
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	 	2.8.	 With prior written consent of Pledgee, Pledgor may increase the capital of Party C. Any equity interest
obtained by Pledgor as a result of Pledgor’s subscription of the increased registered capital of the Company shall also be deemed as Equity Interest. 

  

	 	2.9.	 In the event that Party C is required by PRC law to be liquidated or dissolved, any interest distributed to
Pledgor upon Party C’s dissolution or liquidation shall, upon the request of the Pledgee, be (1) deposited into an account designated and supervised by Pledgee and used to pay the Secured Indebtedness in priority; or (2) donated or
assigned to Pledgee or any other person designated by Pledgee at its sole discretion at the lowest price to the extent permitted under applicable laws of the PRC. 

 

	3.	 Term of Pledge 

 

	 	3.1.	 The Pledge shall become effective on such date when the pledge of the Equity Interest contemplated herein is
registered ‘with relevant administration for industry and commerce. The Pledge shall be continuously valid until all payments due under the Business Cooperation Agreement have been fulfilled by Party C. Pledgor and Party C shall
(1) register the Pledge in the shareholders’ register of Party C within three (3) business days following the execution of this Agreement, and (2) submit an application to the relevant administration for industry and commerce for
the registration of the Pledge of the Equity Interest contemplated herein in a timely manner following the execution of this Agreement. Pledgor and Party C shall submit all necessary documents and complete all necessary procedures, as required by
the PRC laws and regulations and the relevant the relevant administration for industry and commerce, to ensure that the Pledge of the Equity Interest shall be registered and provide documents to Pledgee to evidence the completion of such
registration within thirty (30) days following the execution of this Agreement. 

  

	 	3.2.	 During the Term of Pledge, in the event Pledgors and/or Party C fails to perform the Contract Obligations,
Pledgee shall have the right, but not the obligation, to exercise the Pledge in accordance with the provisions of this Agreement. 

  

	4.	 Custody of Records for Equity Interest subject to Pledge 

 

	 	4.1.	 During the Term of Pledge set forth in this Agreement, Party C shall deliver to Pledgee’s custody the
shareholders’ register containing the Pledge. Pledgee shall have custody of such original documents during the entire Term of Pledge set forth in this Agreement. 

  
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	5.	 Representations and Warranties of Each Pledgor and Party C 

As of the execution date of this Agreement, Pledgor and Party C hereby severally but not jointly represent and warrant to Party A that: 

 

	 	5.1.	 Pledgor is the sole legal and beneficial owner of the Equity Interest. 

 

	 	5.2.	 Pledgee shall have the right to dispose of and transfer the Equity Interest in accordance with the provisions
set forth in this Agreement. 

  

	 	5.3.	 Except for the Pledge, Pledgor has not placed any security interest or other encumbrance on the Equity
Interest. 

  

	 	5.4.	 Pledgor and Party C have obtained any and all approvals and consents from applicable third parties and
government agencies (if required) for execution, delivery and performance of this Agreement. 

  

	 	5.5.	 The execution, delivery and performance of this Agreement will not: (i) violate any relevant PRC laws;
(ii) conflict with Party C’s articles of association, bylaws or other constitutional documents; (iii) result in any breach of or constitute any breach under any contract or instrument to which it is a party or by which it is otherwise
bound; (iv) result in any violation of any condition for the grant and/or maintenance of any permit or permit issued to any Party; or (v) cause any license or permit issued to any Party to be suspended, cancelled or attached with
additional conditions. 

  

	6.	 Covenants of Each Pledgor and Party C 

 

	 	6.1.	 During the term of this Agreement, Pledgor and Party C hereby severally but not jointly covenant to the
Pledgee: 

  

	 	6.1.1.	 Pledgor shall not transfer the Equity Interest, place or permit the existence of any security interest or other
encumbrance on the Equity Interest, without the prior written consent of Pledgee, except for the performance of the Transaction Documents; Party C shall not consent or assist the foregoing actions; 

 

	 	6.1.2.	 Pledgor and Party C shall comply with the provisions of all laws and regulations applicable to the pledge of
rights, and within five (5) days of receipt of any notice, order or recommendation issued or prepared by relevant competent authorities regarding the Pledge, shall present the aforementioned notice, order or recommendation to Pledgee, and shall
comply with the aforementioned notice, order or recommendation or submit objections and representations with respect to the aforementioned matters upon Pledgee’s reasonable request or upon consent of Pledgee; 

 

	 	6.1.3.	 Pledgor and Party C shall promptly notify Pledgee of any event or notice received by Pledgor that may have an
impact on Pledgee’s rights to the Equity Interest or any portion thereof, as well as any event or notice received by Pledgor that may have an impact on any guarantees and other obligations of Pledgor arising out of this Agreement.

  
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	 	6.1.4.	 Party C shall complete the registration procedures for extension of the term of operation within three
(3) months prior to the expiration of such term to maintain the validity of this Agreement. 

  

	 	6.2.	 Pledgor agrees that the rights acquired by Pledgee in accordance with this Agreement with respect to the Pledge
shall not be interrupted or harmed by Pledgor or any heirs or representatives of Pledgor or any other persons through any legal proceedings. 

  

	 	6.3.	 Pledgor and Party C shall strictly abide by the provisions of this Agreement and other contracts jointly or
separately executed by the Parties hereto or any of them, including the Transaction Documents, perform the obligations hereunder and thereunder, and refrain from any action/omission that may affect the effectiveness and enforceability thereof. Any
remaining rights of Pledgor with respect to the Equity Interest pledged hereunder shall not be exercised by Pledgor except in accordance with the written instructions of Pledgee. 

 

	 	6.4.	 To protect or perfect the security interest granted by this Agreement for the Contract Obligations, Pledgor
hereby undertakes to execute in good faith and to cause other parties who have an interest in the Pledge to execute all certificates, agreements, deeds and/or covenants required by Pledgee. Pledgor also undertakes to perform and to cause other
parties who have an interest in the Pledge to perform actions required by Pledgee, to facilitate the exercise by Pledgee of its rights and authority granted thereto by this Agreement, and to enter into all relevant documents regarding ownership of
Equity Interest with Pledgee or designee (s) of Pledgee at its sole discretion (natural persons/legal persons). Pledgor undertakes to provide Pledgee within a reasonable time with all notices, orders and decisions regarding the Pledge that are
required by Pledgee. 

  

	 	6.5.	 Pledgor hereby severally but not jointly guarantees to Pledgee that it will comply with and perform all
guarantees, promises, agreements, representations and conditions under this Agreement. In the event of failure or partial performance of its guarantees, promises, agreements, representations and conditions, Pledgor shall be deemed to be in breach of
this Agreement and shall indemnify Pledgee for all losses resulting therefrom. 

  

	7.	 Event of Breach 

 

	 	7.1.	 The following circumstances shall be deemed Event of Default: 

 

	 	7.1.1.	 Pledgor’s failure or partial performance of its obligations under the Transaction Documents and/or this
Agreement or any breach of any Contract Obligations; 

  

	 	7.1.2.	 Party C’s failure or partial performance of its obligations under the Transaction Documents and/or this
Agreement or any breach of any Contract Obligations. 

  
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	 	7.2.	 Upon notice or discovery of the occurrence of any circumstances or event that may lead to the aforementioned
circumstances described in Section 7.1, Pledgor and Party C shall immediately notify Pledgee in writing accordingly. 

  

	 	7.3.	 Unless an Event of Default set forth in this Section 7.1 has been successfully resolved to Pledgee’s
satisfaction within twenty (20) days after the Pledgee and/or Party C delivers a notice to the Pledgor requesting ratification of such Event of Default, Pledgee may issue a Notice of Default to Pledgor in writing at any time thereafter,
demanding the Pledgor to immediately exercise the Pledge in accordance with the provisions of Section 8 of this Agreement. 

  

	 	7.4.	 For the avoidance of doubt, the Parties agree that notwithstanding anything to the contrary in this Agreement,
Party B shall not be liable for any breach of this Agreement by the other Parties hereto. 

  

	8.	 Exercise of Pledge 

 

	 	8.1.	 Pledgee may issue a Notice of Default to Pledgor when exercising the Pledge. 

 

	 	8.2.	 Subject to the provision of Section 7.3, Pledgee may exercise the right to enforce the Pledge at any time
after the issuance of the Notice of Default in accordance with Section 8.1. 

  

	 	8.3.	 After Pledgee issues a Notice of Default to Pledgor in accordance with Section 8.1, Pledgee may exercise
any remedy measure under applicable PRC laws, the Transaction Documents and this Agreement, including (without limitation) repayment in priority with proceeds from auction or sale of the Equity Interest. The Pledgee shall not be liable for any loss
incurred by its duly exercise of such rights and powers. 

  

	 	8.4.	 The proceeds from exercise of the Pledge by Pledgee shall be used to pay for tax and expenses incurred as
result of disposing the Equity Interest and pay the Secured Indebtedness to Pledgee prior and in preference to any other payment. After the payment of the aforementioned amounts, the remaining balance may be returned to Pledgor or any other person
who have rights thereto under applicable laws, or be deposited to the local notary institution where Pledgor resides (any fees incurred in relation thereto shall be borne by Pledgee); to the extent permitted under applicable PRC laws, Pledgor shall
donate the aforementioned proceeds to Pledgee or any other person designated by Pledgee at its sole discretion. 

  

	 	8.5.	 Pledgee may exercise any remedy measure available simultaneously or in any order. Pledgee is not obliged to
exercise any other remedy measure first before its exercise of the rights to auctions or sale-offs of the Equity Interest. 

  

	 	8.6.	 Pledgee is entitled to designate an attorney or other representatives to exercise the Pledge on its behalf, and
Pledgor or Party C shall not raise any objection to such exercise. 

  
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	 	8.7.	 When Pledgee disposes of the Pledge in accordance with this Agreement, Pledgor and Party C shall provide
necessary assistance to enable Pledgee to enforce the Pledge in accordance with this Agreement. 

  

	9.	 Liability for Breach 

The Parties agree and confirm that, being in violation of any provisions herein or failure or delay of performance of its obligations hereunder
of any Party (the “Defaulting Party”) shall constitute a default under this Agreement (the “Default”), which shall entitle non-defaulting Party to request the Defaulting Party
to rectify or remedy such Default with a reasonable period of time. In the event that the Defaulting Party fails to rectify or remedy such Default during the reasonable period of time or within 10 days of
non-Defaulting Party’s written notice requesting for such rectification or remedy, the non-defaulting Party shall have the right to elect, in its sole discretion:

  

	 	9.1.	 If Pledgor or Party C is the Defaulting Party, Pledgee shall have the right to terminate this Agreement and
request the Defaulting Party to fully compensate all damages; this Section 9 shall not prejudice any other rights of Pledgee herein; 

  

	 	9.2.	 If Pledgee is the Defaulting Party, then the non-defaulting Party may
request the Defaulting Party to fully compensate its losses and damages, but in no event shall the non-defaulting Party early terminate this Agreement unless the applicable laws provide otherwise.

  

	10.	 Assignment 

  

	 	10.1.	 Without Pledgee’s prior written consent, Pledgor shall not have the right to assign or delegate its rights
and obligations under this Agreement. 

  

	 	10.2.	 This Agreement shall be binding on Pledgor and its successors and assigns, and shall be valid with respect to
Pledgee and each of its successors and assigns. 

  

	 	10.3.	 At anytime, Pledgee may assign any and all of its rights and obligations under the Transaction Documents to its
designee (s) at its sole discretion, in which case the assigns shall have the rights and obligations of Pledgee under this Agreement, as if it were the original party to this Agreement. When the Pledgee assigns the rights and obligations under
the Business Cooperation Agreement, upon Pledgee’s request, Pledgor and/or Party C shall execute relevant agreements or other documents relating to such assignment. 

 

	 	10.4.	 In the event of a change in Pledgee due to an assignment, Pledgor and Party C shall, at the request of Pledgee,
execute a new pledge agreement with the new pledgee on the same terms and conditions as this Agreement, and register the same with the relevant administration for industry and commerce. 

  
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	11.	 Termination 

  

	 	11.1.	 The parties acknowledge that although the pledge of the Equity Interest contemplated herein shall only become
effective upon the registration with the relevant administration for industry and commerce, this Agreement shall become effective upon the execution by the parties. 

 

	 	11.2.	 Upon the fulfillment of all Contract Obligations and the full payment of all Secured Indebtedness by Pledgors
and Party C, Pledgee shall release the Pledge under this Agreement upon Pledgor’s request as soon as reasonably practicable and shall assist Pledgors to de-register the Pledge from the shareholders’
register of Party C and with relevant PRC local administration for industry and commerce. 

  

	 	11.3.	 The provisions under Sections9, 13, 14 and 11.3 herein of this Agreement shall survive the termination of this
Agreement. 

  

	12.	 Handling Fees and Other Expenses 

All fees and out of pocket expenses relating to this Agreement, including but not limited to legal costs, costs of production, stamp tax and
any other taxes and fees, shall be borne by Party C. 
  

	13.	 Confidentiality 

The Parties acknowledge that the existence and the terms of this Agreement and any oral or written information exchanged between the Parties in
connection with the preparation and performance this Agreement are regarded as confidential information. Each Party shall maintain confidentiality of all such confidential information, and without obtaining the written consent of the other Party, it
shall not disclose any relevant confidential information to any third parties, except for the information that: (a) is or will be in the public domain (other than through the receiving Party’s unauthorized disclosure); (b) is under the
obligation to be disclosed pursuant to the applicable laws or regulations, rules of any stock exchange, or orders of the court or other government authorities; or (c) is required to be disclosed by any Party to its shareholders, investors,
legal counsels or financial advisors regarding the transaction contemplated hereunder, provided that such shareholders, investors, legal counsels or financial advisors shall be bound by the confidentiality obligations similar to those set forth in
this Section. Disclosure of any confidential information by the staff members or agencies hired by any Party shall be deemed disclosure of such confidential information by such Party, which Party shall be held liable for breach of this Agreement.
This Section shall survive the termination of this Agreement for any reason. 
  

	14.	 Governing Law and Resolution of Disputes 

 

	 	14.1.	 The execution, effectiveness, construction, performance, amendment and termination of this Agreement and the
resolution of disputes hereunder shall be governed by the laws of PRC. 

  
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	 	14.2.	 In the event of any dispute with respect to the construction and performance of this Agreement, the Parties
shall first resolve the dispute through friendly negotiations. In the event the Parties fail to reach an agreement on the dispute within thirty (30) days after either Party’s request to the other Parties for resolution of the dispute
through negotiations, either Party may submit the relevant dispute to the Shanghai International Economic and Trade Arbitration Commission for arbitration, in accordance with its Arbitration Rules. The arbitration shall be conducted in Shanghai, and
the language used in arbitration shall be Chinese. The arbitration award shall be final and binding on all Parties. 

  

	 	14.3.	 Upon the occurrence of any disputes arising from the construction and performance of this Agreement or during
the pending arbitration of any dispute, except for the matters under dispute, the Parties to this Agreement shall continue to exercise their respective rights under this Agreement and perform their respective obligations under this Agreement.

  

	15.	 Notices 

  

	 	15.1.	 All notices and other communications required or permitted to be given pursuant to this Agreement shall be
delivered personally or sent by registered mail, postage prepaid, by a commercial courier service or by facsimile transmission to the address of such Party set forth below. A confirmation copy of each notice shall also be sent by email. The dates on
which notices shall be deemed to have been effectively given shall be determined as follows: 

  

	 	15.1.1.	 Notices given by personal delivery, by courier service or by registered mail, postage prepaid, shall be deemed
effectively given on the date of delivery or refusal at the address specified for notices. 

  

	 	15.1.2.	 Notices given by facsimile transmission shall be deemed effectively given on the date of successful
transmission (as evidenced by an automatically generated confirmation of transmission). 

  

	 	15.2.	 For the purpose of notices, the addresses of the Parties are as follows: 

 

			
	Party A:	  	Shanghai Zhangxue Education Technology Co., Ltd.
		
	Address:	  	Building D, Helen center, Financial Street, 440 Hailun Road, Hongkou District, Shanghai
	Attn:	  	CHEN Zhongyi
	Tel:	  	***
		
	Party B:	  	 WU Jiajun

	Address:	  	Building D, Helen center, Financial Street, 440 Hailun Road, Hongkou District, Shanghai
	Attn:	  	WU Jiajun
	Tel:	  	***
		
	Party B:	  	Shanghai Zhangshi Education Training Co., Ltd.
	Address:	  	Room 202, 2 / F, 82 Tongjia Road, Hongkou District, Shanghai
	Attn:	  	WU Jiajun
	Tel:	  	***

  
 10 

	 	15.3.	 Any Party may at any time change its address for notices by a notice delivered to the other Parties in
accordance with the terms hereof. 

  

	16.	 Severability 

In the event that one or several of the provisions of this Agreement are found to be invalid, illegal or unenforceable in any aspect in
accordance with any laws or regulations, the validity, legality or enforceability of the remaining provisions of this Agreement shall not be affected or compromised in any aspect. The Parties shall strive in good faith to replace such invalid,
illegal or unenforceable provisions with effective provisions that accomplish to the greatest extent permitted by law and the intentions of the Parties, and the economic effect of such effective provisions shall be as close as possible to the
economic effect of those invalid, illegal or unenforceable provisions. 
  

	17.	 Attachments 

The attachments set forth herein shall be an integral part of this Agreement. 

 

	18.	 Effectiveness 

 

	 	18.1.	 Any amendments, changes and supplements to this Agreement shall be in writing and shall come into force from
the date of Party C’s establishment. 

  

	 	18.2.	 This Agreement is written in the Chinese language in four (4) counterparts with the same validity. Each
Party shall hold one counterpart. The other originals shall be used for the registration with the relevant administration for industry and commerce. 

  

	 	18.3.	 This Agreement shall be binding and binding on the Parties and their respective heirs, successors and assigns.

 [The remainder of this page is intentionally left blank] 

  
 11 

 IN WITNESS WHEREOF, the Parties have caused their authorized representatives to execute this
Agreement as of the date first above written. 
 Party A: Shanghai Zhangxue Education Technology Co., Ltd.(Seal) 

 

	
	 /s/ Shanghai Zhangxue Education Technology Co., Ltd.

	Seal of Shanghai Zhangxue Education Technology Co., Ltd.

  

			
	By:	 	 /s/ ZHANG Yi

	Name:	 	ZHANG Yi(张翼)
	Title:	 	Legal Representative

 Shanghai Zhangda – Equity Pledge Agreement – Signature Page 

  
 12 

 IN WITNESS WHEREOF, the Parties have executed, or caused their authorized representatives to
execute, this Agreement as of the date first above written. 
 Party B: WU Jiajun 

 

	
	 Signature: /s/ WU Jiajun

	 Name: WU Jiajun

 Shanghai Zhangda – Equity Pledge Agreement – Signature Page 

  
 13 

 IN WITNESS WHEREOF, the Parties have executed, or caused their authorized representatives to
execute, this Agreement as of the date first above written. 
 Party C: Shanghai Zhangshi Education Training Co., Ltd.(Seal) 

 

	
	 /s/ Shanghai Zhangshi Education Training Co., Ltd.

	 Seal of Shanghai Zhangshi Education Training Co., Ltd.

  

	
	 By: /s/ WU Jiajun

	 Name: WU Jiajun (吴佳峻)

	 Title: Legal Representative

 Shanghai Zhangda – Equity Pledge Agreement – Signature Page 

  
 14

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