Recently, some media reported that some power socket manufacturers ignored the national mandatory standards and produced hole sockets and two-core sockets, with a large number of substandard sockets flowing into the market. Then, do the sockets sold in the local market comply with the national mandatory standards? It is understood that the "Household and Similar Purpose Plugs and Sockets (gb2099.3-2008)" was officially implemented on June 1, 2010, replacing the old national standard of 1997. The new national standard clearly stipulates that the production of hole sockets and two-core sockets is prohibited. The so-called hole socket is a type of plug hole that can be compatible with various plugs such as those of the British standard and the American standard. Two-core sockets are easily distinguishable from their appearance. Any product that has three sockets on the power strip but only two pins on the plug itself is a two-core socket. During the visit, it was found that although there are relatively few merchants selling two-core sockets, many small shops are selling hole sockets. Moreover, most shop owners are not clear about the specific contents of the "new national standard", let alone the safety hazards of hole sockets and two-core sockets. Due to the large number of compatible plugs and the non-standard size of the socket holes, when in use, there may be poor contact and the plugging and unplugging may not be smooth, posing a safety hazard. However, a two-core socket lacks a ground wire. Once an insulating component inside the appliance is damaged, the current cannot be conducted into the ground and will spread all over the surface of the appliance, which can easily cause an electric shock accident.