New Stock News | Olin Biosciences' (688319.SH) Hong Kong IPO prospectus becomes invalid

According to the Securities Times app, the Hong Kong stock prospectus submitted by Chengdu Oulin Biotechnology Co., Ltd. (referred to as Oulin Biology (688319.SH)) on November 25, 2025, expired after 6 months on May 25, 2026. Citic Securities was the sole sponsor at the time of submission.