Amendment No. 4 to Schedule 13G for So-Young International Inc.

This Amendment No. 4 to Schedule 13G, filed by 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, updates the beneficial ownership of Class A ordinary shares of So-Young International Inc. The Reporting Persons collectively own 6.8% of the outstanding Class A ordinary shares, which includes 7,278,745 ADSs held indirectly by MPC III and 808,746 ADSs held indirectly by MPC III-A. The Reporting Persons disclaim status as a 'group' for the purposes of this filing. The amendment is based on information as of September 30, 2025.