Upon installing the Shanghai Telecom 1000M broadband, I experienced consistently low ping rates of around 60ms while gaming. However, recently, ping rates have frequently reached 130ms or higher, even exceeding 200ms and 460ms, causing significant lag issues. This issue persists even when using mobile traffic. My Android phone and another device connected to the same network also exhibit the same problem. After consulting with the broadband technician, who confirmed that there were no issues with the backend data, I suspect that the heatwave during summer may have caused the device to malfunction. I observed that the Wi-Fi router, which I directly connected to my Mi router, also exhibited the same issue. This led me to conclude that the problem is not with the router. To troubleshoot this issue, further investigation is required.