The reason why Xiao Pang can't see the video of working and living in North Korea is the network problem. According to the relevant information of the query, there is something wrong with the long-term use of the router itself, which leads to instability of the router. You can use the restart method to restore the network and turn off the router after the restart. A network consists of many nodes and links connecting them, as well as many objects and their relationships. Before 1999, people thought that the network structure was random.