Exhibit 99.4

August 28, 2018

X Financial (the “Company”)

7-8F, Block A, Aerospace Science and Technology Plaza

No. 168, Haide Third Avenue, Nanshan District

Shenzhen, 518067, the People’s Republic of China

Ladies and Gentlemen:

Pursuant to Rule 438 under the Securities Act of 1933, as amended, I hereby consent to the references to my name in the Registration Statement on Form F-1 (the “Registration Statement”) of the Company and any amendments thereto, which indicate that I have accepted the nomination to become a director of the Company. I further agree that immediately upon the Securities and Exchange Commission’s declaration of effectiveness of the Registration Statement, I will serve as a member of the board of directors of the Company.

Sincerely yours,

/s/ Shengwen Rong

Name: Shengwen Rong