The reason why the health code application shows the location service is because your mobile phone location agency is not authorized to use the health code. Open your mobile phone settings, find the location service option, open it, then find the option of mobile phone application management, then click Open to find the WeChat application, click Permission Management, and check the permission to display the location to allow use.
Introduction of mobile phone location service:
Mobile phone location service, also known as mobile location service, is a value-added service that obtains the location information of mobile phone users through the network of telecom operators with the support of electronic map platform and provides corresponding services for users.
It is recognized by major operators around the world as a new revolution after short messages. It accurately calculates the data of mobile communication network through complex mathematical model, obtains the latitude and longitude coordinates of mobile users, and provides corresponding location services for users with the support of electronic map platform.
A technology or service that obtains the location information (latitude and longitude coordinates) of a mobile phone or an end user through a specific positioning technology, and marks the location of a positioning object on an electronic map.