Did you use Huawei bracelet? The bracelet calculates the distance by stride and step frequency, and the synchronized data has errors with the APP. If you need to use sports health app to record running data, many mobile apps are still GPS, and the signal is not very good. You need to be in an open area as far as possible (in stadiums, lakes and other runways, it will be less accurate), or try to give GPS more buffer space, so that the error of running data is small.