Amendment to Beneficial Ownership Reporting for So-Young International Inc.

This Amendment No. 4 to Schedule 13G, filed on October 27, 2025, updates the beneficial ownership details of multiple reporting entities and individuals, including MPC III L.P., MPC III-A L.P., MPC Management III L.P., MPC GPGP III Ltd., MPC III HK Limited, and David Su. Collectively, these reporting persons hold approximately 6.8% of So-Young International Inc.'s Class A ordinary shares, equivalent to 6,221,153 shares. The ownership is structured through ADSs (American Depositary Shares) and direct holdings, managed via general partnership arrangements. The filing emphasizes that the reporting persons disclaim status as a formal 'group' under SEC regulations. David Su, a director of MPC III GP, is identified as having shared voting and dispositive power over the shares. The amendment reflects adjustments to holdings and reaffirms compliance with Rule 13d-1(d).