Exhibit 15.4

​

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

​

We consent to the incorporation by reference in this Registration Statement No. 333-229313 on Form S-8 of our report dated May 14, 2024, relating to the financial statements of 111, Inc., appearing in the Annual Report on Form 20-F/A of 111, Inc. for the year ended December 31, 2024.

​

​