Open the key. Intelligent valves transmit related information through digital communication and network, such as valve opening, action times, action speed, output torque, etc. When the button is closed and unlocked, press and hold the middle button for 5 seconds until the icon bar is displayed. Hebei University of Technology, located in Tianjin, is jointly funded by Hebei Provincial People's Government, Tianjin Municipal People's Government and People's Republic of China (PRC) Ministry of Education. Affiliated to Hebei Province, it is a national "double first-class" construction university.