From April 1st to 3rd, 2023, the 21st China (Shanghai) International Optics Fair (abbreviation: SIOF2023) was grandly held at the Shanghai World Expo Exhibition Hall. It is reported that the exhibition area of this exhibition exceeds 70,000 square meters, and there are more than 700 exhibitors, including nearly 160 international exhibitors from 18 countries and regions, and 284 international brands on display.