Let"s talk about the background first:

the backend is a node.js + nginx reverse proxy that provides interface apid. The Ali cloud server is used. The project is very small, so we simply provide WeChat Mini Programs"s api.

the problem is that the access under wifi is very fast, but 4G will obviously be slower, about 2cm 4s, which can be felt very much. Api doesn"t have any complex calculations.

very strange!