Answer: This is because the network connection speed between sub-nodes is slow, and the speed of accessing other websites is fast. According to the summary of our technical staff, this situation usually occurs in suburban servers in some developed cities, and it will not last long, about 2-3 hours, and then it will return to normal. The reason is as follows: those who use ADSL dynamic dial-up to access the Internet are all sub-nodes, and public websites are stored in the computer room of telecommunications operators, which are root nodes. The speed of using ADSL dynamic dial-up clients to access websites is normal and fast. However, when using ADSL dynamic dial-up clients to access the server side of the same dial-up Internet, the speed may be affected by routing equipment or network monitoring, and sometimes it will slow down. If you encounter this situation, the answer is to set the POS end to time-sharing mode, or change the location where the server accesses the Internet, such as moving it to the urban area, or rent a server in the telecommunications computer room of the network.