China's Network Access Permit certification, commonly referred to as the Network Access Permit (NAP), is a certification system overseen by the Ministry of Industry and Information Technology (MIIT) of China. This certification primarily targets telecommunications equipment, especially those devices that need to connect to the telecommunications network, such as mobile phones, data cards, wireless modules, etc. The purpose of the Network Access Permit certification is to ensure that these devices meet national standards and regulations in terms of technical performance, safety, electromagnetic compatibility, and do not cause interference or damage to the telecommunications network, while also protecting the legitimate rights and interests of users. To obtain China's Network Access Permit certification, manufacturers need to submit detailed technical information of the relevant equipment and send product samples to designated testing laboratories for a series of tests. These tests evaluate key parameters such as the device's radio transmission characteristics, reception sensitivity, and anti-interference capability. Once the tests are passed and the corresponding test reports are obtained, manufacturers need to submit an application to the Ministry of Industry and Information Technology. After review and approval, they can obtain the Network Access Permit certificate. Only devices with the Network Access Permit certificate can be sold and used in the Chinese market. This certification is an important step for market access of telecommunications-related equipment in China, for manufacturers and importers wishing to sell telecommunications equipment in the Chinese market.