in instrument we can see in cellular network ，Every network request establishes a TCP connection. but in WiFi network，Only the first network request will establish a TCP connection, subsequent requests will not. This seriously affects the performance of our network requests, so why is it like this?
WiFi network：
cellular network：
Right, this can happen if your device is in range of a better network path, such as Wi-Fi, to try and migrate to a Wi-Fi path instead of cellular to make sure that data is used on a non-expensive network for the user. So these connection will not be reused in hopes that they can be migrated to Wi-Fi in the future.