Exhibit 15.4

Our refVSL/675748-000005/21894065v1

CooTek (Cayman) Inc.
11F, T2, No. 16, Lane 399, Xinlong Road
Minhang District, Shanghai, 201101
People’s Republic of China

26 April 2023

Dear Sirs

CooTek (Cayman) Inc.

We have acted as legal advisers as to the laws of the Cayman Islands to CooTek (Cayman) Inc., an exempted company incorporated in the Cayman Islands with limited liability (the “Company”), in connection with the filing by the Company with the United States Securities and Exchange Commission (the “SEC”) of an annual report on Form 20-F for the year ended 31 December 2022 (the “Annual Report”).

We hereby consent to the reference to our firm under the heading “Item 10. Additional Information—E. Taxation—Cayman Islands Taxation” in the Annual Report, and further consent to the incorporation by reference of the summary of our opinion under this heading into the Company's registration statements on Form S-8 (File No. 333-229171) that was filed on 9 January 2019.

We consent to the filing with the SEC of this consent letter as an exhibit to the Annual Report. In giving such consent, we do not thereby admit that we come within the category of persons whose consent is required under Section 7 of the Securities Act of 1933, or under the Securities Exchange Act of 1934, in each case, as amended, or the regulations promulgated thereunder.

Yours faithfully

/s/ Maples and Calder (Hong Kong) LLP

Maples and Calder (Hong Kong) LLP