Document:

EX-4.20

 Exhibit 4.20 

Supplemental Agreement 
 This supplemental
agreement (hereinafter referred to as this “Agreement”) is entered into by and among the following parties in Beijing on October 10, 2019: 
  

	Party A:	 Beijing Dexin Dongfang Network Technology Co., Ltd., a wholly foreign-owned enterprise duly incorporated
and validly existing within the territory of the People’s Republic of China (hereinafter the “PRC”) with its uniform social credit code of 91110108MA01AWYY4A and its registered address at Suite
1701-07, F/17, Building No. 2, Haidian East Third Street, Haidian District, Beijing; 

  

	Party B:	 New Oriental Education Technology Group Limited, a limited liability company duly incorporated and
validly existing within the territory of PRC with its uniform social credit code of 91110108726367151N and registered address at F/9, 6 Haidian Middle Street, Haidian District, Beijing; 

Linzhi Tencent Technology Co., Ltd., a limited liability company duly incorporated and validly existing within the territory of PRC with
its uniform social credit code of 91540400MA6T10MD6L and its registered address at 202-3 Linzhi Biotechnology Industrial Park, Bayi Town, Bayi District, Linzhi City, Tibet; 

 Tianjin Xuncheng Yiyue Technology Partnership (L.P.), a
limited partnership enterprise duly incorporated and validly existing within the territory of PRC with its uniform social credit code of 91120222MA05P74885 and its registered address at Suite 1105, Integrated Office Building, Beijing-Tianjin
Electronic Commerce Industrial Park, Wuqing District, Tianjin; 
 Tianjin Xuncheng Luyue Technology Partnership (L.P.), a limited
partnership enterprise duly incorporated and validly existing within the territory of PRC with its uniform social credit code of 91120222MA06H05071 and its registered address at Suite 1106, Integrated Office Building, Beijing-Tianjin Electronic
Commerce Industrial Park, Wuqing District, Tianjin; 
 Tianjin Xuncheng Bayue Technology Partnership (L.P.), a limited partnership
enterprise duly incorporated and validly existing within the territory of PRC with its uniform social credit code of 91120222MA05P38239 and its registered address at Suite 1108, Integrated Office Building, Beijing-Tianjin Electronic Commerce
Industrial Park, Wuqing District, Tianjin; 
 Tianjin Xuncheng Jiuyue Technology Partnership (L.P.), a limited partnership enterprise
duly incorporated and validly existing within the territory of PRC with its uniform social credit code of 91120222MA05P29199 and its registered address at Suite 1109, Integrated Office Building, Beijing-Tianjin Electronic Commerce Industrial Park,
Wuqing District, Tianjin; 
 Tianjin Xuncheng Shiyue Technology Partnership (L.P.), a limited partnership enterprise duly incorporated
and validly existing within the territory of PRC with its uniform social credit code of 91120222MA05N0621A and its registered address at Suite 1110, Integrated Office Building, Beijing-Tianjin Electronic Commerce Industrial Park, Wuqing District,
Tianjin; 

 Tianjin Xuncheng Shieryue Technology Partnership (L.P.), a limited partnership
enterprise duly incorporated and validly existing within the territory of PRC with its uniform social credit code of 91120222MA06H0486G and its registered address at Suite 1107, Integrated Office Building, Beijing-Tianjin Electronic Commerce
Industrial Park, Wuqing District, Tianjin; 
 Tianjin Xuncheng Shisanyue Technology Partnership (L.P.), a limited partnership
enterprise duly incorporated and validly existing within the territory of PRC with its uniform social credit code of 91120222MA06G95810 and its registered address at Suite 1111, Integrated Office Building, Beijing-Tianjin Electronic Commerce
Industrial Park, Wuqing District, Tianjin. 
  

	Party C:	 Beijing New Oriental-Xuncheng Network Technologies Co., Ltd., a company limited by shares duly
incorporated and validly existing within the territory of PRC with its uniform social credit code of 9111010877256341X4 and registered address at 1801-08 F/18, No.2 Haidian East Third Street, Haidian District,
Beijing. 

 Party C’s subordinate institutions: all the entities mentioned in Appendix I, and the institutions
invested and controlled by Party C from time to time in accordance with this Agreement (including control through agreement arrangement). 

	Party D:	 Zhuhai Chongsheng Heli Network Technology Co., Ltd., a limited
liability company duly incorporated and validly existing within the territory of PRC with its uniform social credit code of 91440400MA53HUAU2Y and registered address at Suite 105-67654, 6 Baohua Street,
Hengqin Xin District, Zhuhai. 

 Party A, Party B, Party C, Party C’s subordinate institutions and Party D are hereinafter referred
to as a “Party” individually, and collectively as the “Parties”. 
 WHEREAS: 

Party A, Party B, Party C and Party C’s subordinate institutions have respectively or collectively signed Exclusive Option Purchase Agreement, Exclusive
Management Consultancy and Cooperation Agreement, Equity Pledge Agreement, Powers of Attorney, and Letters of Undertaking (hereinafter collectively referred to as the “Original Agreements”). 

NOW, THEREFORE, through friendly negotiations, Parties reach the following agreement with respect to Party D’s joinder as a party to the Original
Agreements: 
  

	1.	 Parties agree that Party D is hereby made a party to the Original Agreements and shall gain all rights enjoyed
by Party A and share, with Party A, all obligations born by Party A thereunder. 

  

	2.	 This Agreement shall become effective upon execution. This Agreement shall be dissolved or terminated
concurrently with the dissolution or termination of the Original Agreements. 

	3.	 This Agreement shall constitute a valid part of the Original Agreements and have equal effect. This Agreement
shall prevail if there is any inconsistency between this Agreement and the Original Agreements. 

  

	4.	 Except for the subjects hereof, the Original Agreements shall remain in full force and effect, and for the
subjects not in the Original Agreements, Parties shall resolve such subjects through negotiation. 

  

	5.	 This Agreement shall be executed in thirteen (13) counterparts, and each Party shall maintain one
(1) counterpart. Each counterpart shall have the same legal effect. 

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left blank) 

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Party A: Beijing Dexin Dongfang Network Technology Co., Ltd. (seal) 

/s/ seal 
 Signed by the Legal Representative or Authorized
Representative: 
 /s/ the Legal Representative or Authorized Representative 

 (The remainder of this page is intentionally left blank; execution page of the Supplemental Agreement) 

Party B: New Oriental Education Technology Group Limited (seal) 

/s/ seal 
 Signed by the Legal Representative or Authorized
Representative: 
 /s/ the Legal Representative or Authorized Representative 

 (The remainder of this page is intentionally left blank; execution page of the Supplemental Agreement) 

Party B: Linzhi Tencent Technology Co., Ltd. (seal) 
 /s/ seal

 Signed by the Legal Representative or Authorized Representative: 

/s/ the Legal Representative or Authorized Representative 

 (The remainder of this page is intentionally left blank; execution page of the Supplemental Agreement) 

Party B: 
 Tianjin Xuncheng Yiyue Technology Partnership (L.P.)
(seal) 
 /s/ seal 
 Signed by the Legal Representative or
Authorized Representative: 
 /s/ the Legal Representative or Authorized Representative 

Tianjin Xuncheng Luyue Technology Partnership (L.P.) (seal) 

/s/ seal 
 Signed by the Legal Representative or Authorized
Representative: 
 /s/ the Legal Representative or Authorized Representative 

Tianjin Xuncheng Bayue Technology Partnership (L.P.) (seal) 

/s/ seal 
 Signed by the Legal Representative or Authorized
Representative: 
 /s/ the Legal Representative or Authorized Representative 

Tianjin Xuncheng Jiuyue Technology Partnership (L.P.) (seal) 

/s/ seal 
 Signed by the Legal Representative or Authorized
Representative: 
 /s/ the Legal Representative or Authorized Representative 

 (The remainder of this page is intentionally left blank; execution page of the Supplemental Agreement) 

Party B: 
 Tianjin Xuncheng Shiyue Technology Partnership (L.P.)
(seal) 
 /s/ seal 
 Signed by the Legal Representative or
Authorized Representative: 
 /s/ the Legal Representative or Authorized Representative 

Tianjin Xuncheng Shieryue Technology Partnership (L.P.) (seal) 

/s/ seal 
 Signed by the Legal Representative or Authorized
Representative: 
 /s/ the Legal Representative or Authorized Representative 

Tianjin Xuncheng Shisanyue Technology Partnership (L.P.) (seal) 

/s/ seal 
 Signed by the Legal Representative or Authorized
Representative: 
 /s/ the Legal Representative or Authorized Representative 

 (The remainder of this page is intentionally left blank; execution page of the Supplemental Agreement) 

Party C: Beijing New Oriental-Xuncheng Network Technologies Co., Ltd. (seal) 

/s/ seal 
 Signed by the Legal Representative or Authorized
Representative: 
 /s/ the Legal Representative or Authorized Representative 

 (The remainder of this page is intentionally left blank; execution page of the Supplemental Agreement) 

Subordinate Institutions of Party C: 
 Beijing Kuxue-Huisi
Network Technology Co., Ltd. (seal) 
 /s/ seal 
 Signed by
the Legal Representative or Authorized Representative: 
 /s/ the Legal Representative or Authorized Representative 

Beijing Dongfang Youbo Network Technology Co., Ltd. (seal) 
 /s/
seal 
 Signed by the Legal Representative or Authorized Representative: 

/s/ the Legal Representative or Authorized Representative 

 (The remainder of this page is intentionally left blank; execution page of the Supplemental Agreement) 

Party D: Zhuhai Chongsheng Heli Network Technology Co., Ltd. (seal) 

/s/ seal 
 Signed by the Legal Representative or Authorized
Representative: 
 /s/ the Legal Representative or Authorized Representative 

 Appendix I: List of the Subordinate Institutions of Party C 

 

			
	 No
	  	 Name

	1.	  	Beijing Kuxue-Huisi Network Technology Co., Ltd.
	2.	  	Beijing Dongfang Youbo Network Technology Co., Ltd.EX-4.21

 Exhibit 4.21 

Letter of Acceptance 
 We,
Beijing Dongfang Youbo Network Technology Co., Ltd., are a duly incorporated limited liability company. We have finished the register of share transfer on August 21, 2019 and after which Beijing New Oriental-Xuncheng Network Technologies Co.,
Ltd. (hereinafter referred to as “Xuncheng”) holds 100% equity interests of us. 
 According to the Exclusive Management
Consultancy and Cooperation Agreement (hereinafter referred to as the “Agreement”) dated as of May 10, 2018 among Beijing Dexin Dongfang Network Technology Co., Ltd., Xuncheng and its shareholders and other parties therein, we shall
join the Agreement as a new subordinate institution of Party B under article 9.1 of the Agreement. 
 We hereby agree to join the Agreement
as a subordinate institution of Xuncheng from the effective date of this Letter of Acceptance, and gain all rights and assume all obligations under the Agreement (including its amendments and supplements from time to time). This Letter of Acceptance
shall become effective upon the date of execution. 
 Beijing Dongfang Youbo Network Technology Co., Ltd. (seal) 

/s/ seal
 Signed by the Legal
Representative: 
 /s/ the Legal Representative or Authorized Representative 

October 10, 2019

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