Why the mileage record of the Xiaomi Watch S3 is inaccurate? (During outdoor exercise, the phone recorded 6km, but the watch showed only 5km.)

When exercising outdoors, distance calculation depends on positioning information. Please choose an open field as much as possible when exercising outdoors to ensure better positioning accuracy. At the same time, Xiaomi Watch S3 supports an intelligent selection of positioning signal sources when connected to a mobile phone. Therefore, it is recommended to check whether the mobile phone has given complete positioning permissions to the Mi Fitness App to improve distance accuracy.