Kunming Railway Station South Station wireless network has no password. Wifi in the waiting room of railway station generally has no password, but it needs authentication. Every railway station is different. Some railway stations can be used once they are successfully certified, but the signal is very weak. The so-called wireless network refers to a network that can realize the interconnection of various communication devices without wiring. Wireless network technology covers a wide range, including global voice and data networks that allow users to establish long-distance wireless connections, as well as infrared and RF technologies optimized for short-distance wireless connections.