New stock news | Best (300580.SZ) Hong Kong IPO prospectus invalid

According to the Securities Times APP, the Hong Kong stock prospectus submitted by Zhenjiang Best New Materials Co., Ltd. (referred to as Best, 300580.SZ) on January 12, 2026 expired after 6 months on July 12, 2026, with Guotai Junan International as its sole sponsor.