From July 24 to 26, the 2021 Optoelectronics Industry Expo was held in Beijing Yichuang International Convention and Exhibition Center. Many industry experts gathered at this event. This exhibition focused on displaying innovative products in the fields of infrared micro-light technology and applications, laser and intelligent manufacturing, optical communication & optical sensing and Internet of Things, optics & precision optical manufacturing, measurement and control technology and instruments. The self-developed optoelectronic device test system solution for fiber optic gyroscopes by SIO was unveiled, attracting many experts and scholars to stop and exchange, discuss and seek cooperation.