On September 16, the 23rd China International Optoelectronic Expo (CIOE 2021) was grandly opened in Shenzhen International Convention and Exhibition Center for a period of three days. As a comprehensive exhibition of domestic optoelectronic industry with scale and influence, this CIOE Shenzhen Optical Expo has a display area of 160,000 square meters, with over 3,000 exhibitors, attracting the participation and attention of many professionals from inside and outside the industry. With 7 thematic solutions and products, such as 5G bearer, next generation intelligent data center, optical module, smart grid, smart terminal, all-optical network, IOT online monitoring, etc., SDGI presented its innovative technology and comprehensive solutions for optoelectronic and communication applications in a multi-dimensional manner.