Wired communication equipment mainly introduces solutions for serial communication in industrial sites, professional bus communication, industrial Ethernet communication, and conversion devices between various communication protocols, including routers, switches, modems, and other devices. Wireless communication equipment mainly includes wireless AP, wireless bridge, wireless network card, wireless lightning arrester, antenna and other equipment. Communication also includes military communication and civil communication. The three major communication operators in China are mobile communication, China Unicom communication, and telecommunications