The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

This CUSIP number applies to the Issuer’s American Depositary Shares, each representing 15 Class A ordinary shares.

Names of Reporting Persons

Nangeng Zhang

Check the appropriate box if a member of a Group (see instructions)

(a)  ☐        (b)  ☐

SEC Use Only

Citizenship or Place of Organization

People’s Republic of China

Number of

Shares

Beneficially

Owned by

Each

Reporting

Person

With:

Sole Voting Power

311,624,444⁽¹⁾

Shared Voting Power

0

Sole Dispositive Power

311,624,444⁽¹⁾

Shared Dispositive Power

0

Aggregate Amount Beneficially Owned by Each Reporting Person

311,624,444⁽¹⁾

Check if the aggregate amount in row (9) excludes certain shares (See Instructions)

☐

Percent of class represented by amount in row (9)

13.1% of Class A ordinary shares assuming conversion of the Class B ordinary shares held by the Reporting Person only into Class A ordinary shares (or 13.1% of total Class A ordinary shares, assuming conversion of all outstanding Class B ordinary shares of the Issuer into Class A ordinary shares).⁽²⁾ The voting power of the shares beneficially owned by the Reporting Person represent 69.4% of the total outstanding voting power.⁽³⁾

Type of Reporting Person (See Instructions)

IN

Represents 311,624,444 Class B ordinary shares held by Flueqel Ltd.

The percentage of the class of securities beneficially owned by each reporting person is calculated based on 2,060,597,778 Class A ordinary shares and 311,624,444 Class B ordinary shares of the Issuer issued and outstanding as of December 31, 2020.

The percentage of voting power is calculated by dividing the voting power beneficially owned by such person or group by the voting power of all of Class A ordinary shares and Class B ordinary shares of the Issuer issued and outstanding as of December 31, 2020. In respect of all matters subject to a shareholders’ vote, each Class A ordinary share is entitled to one vote, and each Class B ordinary share is entitled to 15 votes, voting together as one class. Each Class B ordinary share is convertible into one Class A ordinary share at any time by the holder thereof. Class A ordinary shares are not convertible into Class B ordinary shares under any circumstances.

Names of Reporting Persons

Flueqel Ltd.

Check the appropriate box if a member of a Group (see instructions)

(a)  ☐        (b)  ☐

SEC Use Only

Citizenship or Place of Organization

British Virgin Islands

Number of

Shares

Beneficially

Owned by

Each

Reporting

Person

With:

Sole Voting Power

311,624,444⁽¹⁾

Shared Voting Power

0

Sole Dispositive Power

311,624,444⁽¹⁾

Shared Dispositive Power

0

Aggregate Amount Beneficially Owned by Each Reporting Person

311,624,444⁽¹⁾

Check if the aggregate amount in row (9) excludes certain shares (See Instructions)

☐

Percent of class represented by amount in row (9)

13.1% of Class A ordinary shares assuming conversion of the Class B ordinary shares held by the Reporting Person only into Class A ordinary shares (or 13.1% of total Class A ordinary shares, assuming conversion of all outstanding Class B ordinary shares of the Issuer into Class A ordinary shares).⁽²⁾ The voting power of the shares beneficially owned by the Reporting Person represent 69.4% of the total outstanding voting power.⁽³⁾

Type of Reporting Person (See Instructions)

CO

Represents 311,624,444 Class B ordinary shares held by Flueqel Ltd.

The percentage of the class of securities beneficially owned by each reporting person is calculated based on 2,060,597,778 Class A ordinary shares and 311,624,444 Class B ordinary shares of the Issuer issued and outstanding as of December 31, 2020.

The percentage of voting power is calculated by dividing the voting power beneficially owned by such person or group by the voting power of all of Class A ordinary shares and Class B ordinary shares of the Issuer issued and outstanding as of December 31, 2020. In respect of all matters subject to a shareholders’ vote, each Class A ordinary share is entitled to one vote, and each Class B ordinary share is entitled to 15 votes, voting together as one class. Each Class B ordinary share is convertible into one Class A ordinary share at any time by the holder thereof. Class A ordinary shares are not convertible into Class B ordinary shares under any circumstances.

Name of Issuer:

Address of Issuer’s Principal Executive Offices:

Name of Person Filing:

Nangeng Zhang, a citizen of the People’s Republic of China; and

Flueqel Ltd. (“Flueqel”), a company organized under the law of the British Virgin Islands and is wholly owned by Nangeng Zhang.

Address of Principal Business Office or, if None, Residence:

The address of Nangeng Zhang is 1-2/F, QianFang Science Building C Building No. 27, Zhongguancun Software Park (Phase I) No. 8 Dongbeiwang West Road Haidian District, Beijing, 100193 People’s Republic of China .

The registered address of Flueqel is Sertus Chambers, P.O. Box 905, Quastisky Building, Road Town, Tortola, British Virgin Islands.

Citizenship:

Title and Class of Securities:

CUSIP No.:

If this statement is filed pursuant to §§ 240.13d-1(b), or 240.13d-2(b) or (c), check whether the person filing is a:

Ownership

Reporting Person⁽¹⁾

Nangeng Zhang

Flueqel

As of December 31, 2020, Flueqel directly owned 311,624,444 of the Issuer’s Class B ordinary shares. Flueqel is indirectly wholly owned by a trust of which Nangeng Zhang is the beneficiary. Accordingly, Nangeng Zhang may thereby be deemed to beneficially own the 311,624,444 Class B ordinary shares owned by Flueqel.

The percentage of the class of securities beneficially owned by the Reporting Person is calculated based on 2,060,597,778 Class A ordinary shares and 311,624,444 Class B ordinary shares held by the Reporting Person that were convertible into the same number of Class A ordinary shares at any time by the Reporting Person as of December 31, 2020.

The percentage of voting power is calculated by dividing the voting power beneficially owned by such person or group by the voting power of all of Class A ordinary shares and Class B ordinary shares of the Issuer issued and outstanding as of December 31, 2020. In respect of all matters subject to a shareholders’ vote, each Class A ordinary share is entitled to one vote, and each Class B ordinary share is entitled to 15 votes, voting together as one class. Each Class B ordinary share is convertible into one Class A ordinary share at any time by the holder thereof. Class A ordinary shares are not convertible into Class B ordinary shares under any circumstances.

Ownership of Five Percent or Less of a Class.

Ownership of more than Five Percent on Behalf of Another Person.

Identification and classification of the subsidiary which acquired the security being reported on by the parent holding company or control person.

Identification and classification of members of the group.

Notice of Dissolution of Group.

Certifications.

Exhibit No.

Description