Power of Attorney for Section 16 Reporting Obligations

This filing details a Power of Attorney granted by Conor Chia-hung Yang, a director of NovaBridge Biosciences, to representatives including Xi-Yong (Sean) Fu. The power of attorney authorizes these representatives to execute and file Forms 3, 4, and 5 with the SEC on behalf of Mr. Yang, as required by Section 16 of the Securities Exchange Act of 1934. This includes obtaining transaction information and making necessary filings. The filing also discloses two employee stock options granted to Mr. Yang: one for 114,093 Ordinary Shares with an exercise price of $1.22, granted on October 1, 2024, and another for 34,530 Ordinary Shares with an exercise price of $3.86, granted on October 1, 2025. The power of attorney remains in effect until Mr. Yang is no longer required to file these forms, unless earlier revoked.