WeChat official account refers to WeChat official account, which includes subscription number, service number and enterprise number;
Among them, the service number can apply for a custom menu; The subscription number can be in the subscriber's address book;
Enterprise number can simplify the management process, improve the efficiency of information communication and cooperation, and enhance the service and management ability for front-line employees.
Positioning system is an interrelated aggregate or device (component) with the goal of determining spatial position.
This system can ensure that at least four satellites can be observed at any point on the earth at any time, thus ensuring that satellites can collect the latitude, longitude and height of observation points and realize the functions of navigation, positioning and timing.