Document:

EX-4.51

 Exhibit 4.51 

Spousal Consent 
 I, Jiayu Li (ID Card
No. ***), the legal spouse of WANG Kun (ID Card No. ***; hereinafter referred to as “Shareholder”), hereby fully recognize and unconditionally and irrevocably give consent to Shareholder to execute the following documents
(hereinafter referred to as “Control Documents”) on July 5, 2018, and agree to dispose of, in accordance with the provisions of Control Documents, the equities in Beijing Conew Technology Development Co., Ltd.
(“Domestic Company”) held by and registered under the name of Shareholder: 
  

	(1)	 Equity Pledge Agreement signed among Shareholder, Conew Network Technology (Beijing) Co., Ltd. (hereinafter
referred to as “Solely-owned Company”), Domestic Company and other shareholders of Domestic Company on July 5, 2018; 

  

	(2)	 Exclusive Equity Option Agreement signed among Shareholder, Solely-owned Company, Domestic Company and other
shareholders of Domestic Company on July 5 , 2018; 

  

	(3)	 Proxy Agreement and Power of Attorney signed and issued by Shareholder on July 5, 2018;

 I further confirm that my further authorization or consent is not required if Shareholder performs Control Documents and further
revises or terminates such documents. 
 I undertake to execute all necessary documents and take all necessary actions to ensure that Control Documents (as
revised from time to time) are duly performed. 
 I further agree and undertake that nothing of my actions shall conflict with the above arrangements,
including not to claim that the aforesaid equities constitute the spouse property or the community property between Shareholder and I and any other rights or interests that may be relevant to the aforesaid equities. I further agree and undertake
that if I obtain any equity interest in Domestic Company by any reason, I shall be bound by Control Documents and comply with the shareholders’ obligations under Control Documents, and for this purpose, as per request from Solely-owned Company,
I shall sign a series of agreements with the same format and of the same content as Control Documents. 
 [Signature Page Follows] 

 [Signature Page to Spousal Consent] 

/s/ Jiayu Li     
  

Jiayu LiEX-4.52

 Exhibit 4.52 

Audience Network Terms 
 These Audience Network Terms
(“Audience Network Terms”) are made and entered into by and between Facebook, Inc. and Facebook Ireland Limited (“FB”) and the person or entity accepting these Audience Network Terms (“Publisher”).
These Audience Network Terms are deemed accepted and agreed to by Publisher on the date that Publisher indicates its assent to these Audience Network Terms by clicking “agree” or “accept” (the “Effective
Date”). If you are accepting on behalf of a legal entity, you represent and warrant that you are an authorised representative of such entity with the authority to bind it to these Audience Network Terms. 

 

	 	1.	 General Terms. FB will work with Publisher to facilitate the placement of third party and/or FB
advertisements or other commercial or sponsored content (“Ads”) on certain of Publisher’s properties, which may include Publisher’s mobile applications, mobile websites and video players on approved websites and apps, as
set forth in the Audience Network Policy (as defined below) and approved by FB in its sole discretion (“Publisher Properties”). If applicable, FB will work with Publisher to facilitate the placement of ads on Publisher’s
articles displayed on Facebook through use of Facebook Instant Articles (“Publisher Instant Articles”) or Publisher’s instant games displayed through Facebook’s products or services through use of Facebook Instant Games
(“Publisher Instant Games”, together with Publisher Instant Articles, “Publisher Instant Properties”). Publisher agrees that these Audience Network Terms will apply to any use by Publisher of the Audience
Network Service (defined below); provided, however, that Section 3 will not apply to Publisher’s use of the Audience Network Service for Publisher Instant Articles. As between FB and Publisher, FB retains exclusive ownership of the
Audience Network Service (which, for clarity, excludes Publisher Properties and Publisher Instant Properties). 

  

	 	2.	 Audience Network participation. Publisher agrees that FB may serve Ads on the Publisher Properties and
Publisher Instant Properties (the “Audience Network Service”). Publisher will participate in the Audience Network Service during the Term in accordance with these Audience Network Terms. Publisher (a) understands and agrees
that FB may change, withdraw or discontinue the Audience Network Service in its sole discretion and FB will use good faith efforts to provide Publisher with notice of the same; and (b) agrees that to the extent Publisher elects to report to FB
problems, issues, ideas, feedback and suggestions for enhancements to and improvements to performance of the Audience Network Service (“Programme Feedback”); such Programme Feedback is entirely voluntary on the part of Publisher and
may be used without obligation of any kind to Publisher. 

  

	 	3.	 Implementation 

 

	 	1.	 Publisher will comply with the Audience Network Service specifications provided by FB from time to time to
enable proper delivery, display, tracking and reporting of Ads, including without limitation, by not modifying, misusing or deriving data from the technology (e.g. the FB SDK, FB tags or FB APIs, as applicable) provided to Publisher by FB
(the “FB Tools”). FB may modify, suspend or terminate your access to, or discontinue the availability of the FB Tools at any time. 

 

	 	2.	 With respect to the Publisher Properties and Publisher Instant Games, Publisher will integrate the applicable
FB Tools provided by FB in connection with the Audience Network Service as soon as reasonably practicable. During the Term, if FB provides an updated version of the FB Tools, Publisher will update the Publisher Properties and Publisher Instant Games
to include the updated version of such FB Tools as soon as reasonably practicable. 

  

	 	3.	 Publisher will comply with FB’s Audience Network Policy (currently available at
https://developers.facebook.com/docs/audience-network/policy) (the “Audience Network Policy”) and FB’s Platform Policy (currently available at https://developers.facebook.com/policy/). Publisher will be solely
responsible for all aspects of the Publisher Properties and Publisher Instant Games, including all content therein. 

	 	4.	 Any placement of Ads on the Publisher Properties and Publisher Instant Games will be subject to the Audience
Network Policy. 

  

	 	4.	 Payment. 

  

	 	1.	 Each month during the Term, for all Publisher Properties and Publisher Instant Properties on which Ads were
displayed during the previous month, FB will pay Publisher a percentage of Net Revenue (defined below) arising from such Publisher Properties and Publisher Instant Properties for the previous month as solely determined by FB. All payments will be
made in accordance with this Section 4.1 unless otherwise agreed to by FB in writing. “Net Revenue” means (a) the amounts actually collected by FB from advertisers for Ads displayed on Publisher Properties and
Publisher Instant Properties, minus (b) deductions for fraud, bad debt, chargebacks, refunds, credit card processing fees and any other third-party fees. Publisher agrees to accurately complete and timely provide to FB any forms or
documentation that FB determines is required to set up payment to Publisher, and Publisher may update such payment information upon notice to FB provided that such information is complete and accurate and Publisher has the requisite authority to
provide such information. Subject to the foregoing, approximately 21 days following the end of the calendar month in which the transaction occurred, FB will pay Publisher the Net Revenue associated with such calendar month. In the event that a
payment from FB to Publisher for any given pay period would be less than One Hundred United States Dollars ($100.00), FB reserves the right to roll such payment over month to month until such threshold is met (unless Publisher’s account is
being deactivated or terminated), at which time FB will make the applicable payment to Publisher. FB reserves the right to deduct from any payments due or payable to Publisher any amounts that are past due and remain uncollected by FB from Publisher
in connection with any other FB product or service. 

  

	 	2.	 Publisher will not, and will not authorise or encourage any third party to, directly or indirectly, generate
impressions, click-throughs, conversions or other actions with respect to an Ad through any automated, deceptive, fraudulent or otherwise invalid means, including through repeated manual clicks, the use of “robots” or other automated tools
or by payment of money, false representation or any illegal or otherwise invalid means for end users to take actions with respect to an Ad. Notwithstanding anything to the contrary in these Audience Network Terms, FB will not be liable for any
payment (a) based on such fraudulent activity or invalid activity, as determined by FB in its discretion, or (b) in the event of any breach by Publisher of these Audience Network Terms (including the Audience Network Policy) during any
applicable pay period. FB reserves the right to withhold payment or charge back Publisher’s account due to any of the foregoing pending FB’s investigation, or in the event that an advertiser whose Ads are displayed in connection with
Publisher Properties or Publisher Instant Properties defaults on payment for such Ads. FB’s records and figures will be used to determine all payments. 

  

	 	3.	 Publisher will provide FB with applicable tax forms, documents or certifications as may be required by
applicable law for FB to satisfy any information reporting and/or withholding tax obligations with respect to any payments hereunder. Where applicable, Publisher agrees that Publisher will be solely responsible for compliance with local tax
regulations. Where applicable within the European Union, Publisher (A) agrees that FB will prepare and issue VAT invoices under self-billing arrangement, (B) acknowledges and accepts the validity of such self-billed invoices and
(C) agrees that Publisher will be responsible for timely remittance to applicable tax authorities of any tax amounts on such self-billed invoices that were paid to Publisher by FB. 

	 	5.	 Privacy and data. 

 

	 	1.	 With respect to Publisher Properties, Publisher will (a) comply with all applicable privacy and data laws
and regulations and industry and government guidelines (including but not limited to, the Children’s Online Privacy Protection Act (COPPA) and the Digital Advertising Alliance’s Self-Regulatory Principles); and (b) provide (i) robust
and sufficiently prominent notice to and obtain the necessary consent in accordance with applicable laws from users regarding the collection, sharing and use of data by FB and its affiliates that, at a minimum, includes a clear and prominent notice
that third parties, including FB, may use cookies, web beacons and other storage technologies to collect or receive information from Publisher Properties and use that information to provide measurement services and target ads, (ii) information
on how users can opt out of the collection and use of information for ad targeting, and (iii) information on where a user can access a mechanism for exercising such choice (e.g. providing links to: http://www.aboutads.info/choices and
http://www.youronlinechoices.eu). In jurisdictions that require informed consent for the storing and accessing of cookies or other information on an end user’s device (such as but not limited to the European Union), Publisher must ensure,
in a verifiable manner, that an end user provides any necessary consent before Publisher uses the FB Tools to enable FB to store and access cookies or other information on the end user’s device. (For suggestions on implementing consent
mechanisms, visit Facebook’s Cookie Consent Guide for Sites and Apps). 

  

	 	2.	 Publisher will not collect or store any data collected, derived or obtained from any Ad or use of the Audience
Network Service (“FB Advertising Data”), except solely as necessary to implement the Audience Network Service in accordance with these Audience Network Terms. Without limiting the generality of the foregoing restriction, Publisher
agrees that it will not (a) collect, store or use any information about any user derived from the Ad served by FB to such user on the Publisher Properties and Publisher Instant Properties, including information derived from the content of the
Ad creative, a user’s engagement with the Ad or the content accessed by a user after navigating to the Ad landing page; (b) use (i) data from the Audience Network Service to categorise a user of Publisher Properties as a FB user,
(ii) identifiers provided by FB to retarget users or deliver advertising based on user behaviours apart from the Audience Network Service or (iii) any FB Advertising Data to build or enhance profiles, including any profiles associated with
any personally identifiable information, mobile device identifier or other unique identifier that identifies any particular individual, user, browser, computer or device; or (c) directly or indirectly, transfer or sell any FB Advertising Data
to any third party. FB will comply with its own publicly posted privacy policy in connection with FB’s performance under these Audience Network Terms. In addition, with respect to Publisher Properties, Publisher will (y) deploy
administrative, physical and technical safeguards that prevent unauthorised access to any FB Advertising Data in its possession or control; and (z) provide FB with reasonably prompt written notice as soon as it becomes aware that it has or is
likely to breach any of the terms set forth in this Section. To the extent that FB processes personal data through Publisher Properties to provide the Audience Network Service subject to the General Data Protection Regulation (Regulation (EU)
2016/679) (the “GDPR”), FB acknowledges that it is a data controller of that personal data. 

  

	 	6.	 Confidentiality. “Confidential Information” of a party means any and all non-public product plans or business plans disclosed by such party to the other party in connection with the Audience Network Service, and that is marked or designated as confidential at the time of disclosure.
During and after the Term, each party (a) will use the same degree of care to protect the Confidential Information of the other party as it uses to protect its own most highly confidential information, but in no circumstances less than
reasonable care; and (b) will not disclose the Confidential Information of the other party to any person or entity other than its officers, employees and consultants who need access to such Confidential Information to effect the intent of these
Audience Network Terms and who are bound by written confidentiality obligations consistent with this Section. The foregoing confidentiality obligations impose no obligations with respect to information that: (w) was in a party’s possession

	 	
before receipt from the other party; (x) is or becomes a matter of public knowledge through no fault of a party; (y) was rightfully disclosed to a party by a third party without
restriction on disclosure; or (z) is developed by a party without use of the Confidential Information of the other party as can be shown by documentary evidence. A party may make disclosures to the extent required by law or court order,
provided such party makes commercially reasonable efforts to provide the other party with notice of such disclosure as promptly as possible and provides reasonable cooperation to the other party in connection with any attempt to contest or limit
such disclosure. Without limiting the foregoing, Publisher will not issue any press release or otherwise make any public statements or disclosures (including to the Internet press, e.g. any blogs) regarding these Audience Network Terms and the
transactions contemplated hereby or consummated hereunder or about the relationship of the parties without the prior written approval of FB. 

  

	 	7.	 Term and termination. The Term of these Audience Network Terms will begin on the Effective Date and
continue until terminated in accordance with this Section 7 (“Term”). These Audience Network Terms may be terminated by either party with or without cause immediately upon written notice to the other party; provided, however,
that if Publisher provides written notice of termination, such termination will be deemed effective only after Publisher ceases to use the Audience Network Service. Sections 2.b and 5-8 of these Audience
Network Terms will survive any termination or expiration of the Audience Network Terms. 

  

	 	8.	 Miscellaneous. These Audience Network Terms govern Publisher’s use of the Audience Network Service.
The Audience Network Service (including the FB Tools) is part of “Facebook” under FB’s Terms of Service (currently at https://www.facebook.com/legal/terms/update, the “Terms of Service”), which is
incorporated herein by reference, and Publisher’s use of the Audience Network Service (including the FB Tools) is deemed part of Publisher’s use of and actions on “Facebook”. In the event of any conflict or inconsistency between
the provisions of these Audience Network Terms and the provisions of the Terms of Service, the provisions of these Audience Network Terms will control, but only with respect to the subject of these Audience Network Terms. The provisions of the Terms
of Service will survive any termination or expiration of these Audience Network Terms to the extent that Publisher continues to use any other features or services of FB thereafter. FB may update or modify these Audience Network Terms with thirty
(30) days prior written notice to Publisher (via email or by posting notice on the FB site), provided that Publisher may elect to terminate during such thirty (30) day period with written notice to FB, which termination shall be effective
at the end of such period. Publisher’s continued use of the Audience Network Service after such period will be deemed Publisher’s acceptance of the updated Audience Network Terms. 

Last Modified 30 April 2018

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