The water control adopts a one terminal multi application mode, and the G401 virtual card split water control is mainly used in application places such as drinking water and hot water, centralized bathrooms, etc. Supported by Perfect Campus and the virtual card one card platform, it can achieve card free operation through mobile apps and is compatible with card holding operations. Students can achieve online payment, debt clearing, and blacklist recognition functions when consuming with a card; Water control not only supports card consumption, but also supports virtual card consumption; Support timing and flow measurement applications, as well as electromagnetic and electric valves, to meet various application needs, solve student water use problems, and meet management needs.