Yes Zhangjiakou Library has wifi and provides free wireless network service, which is convenient for readers to surf the Internet in the library. This wifi can be used anywhere, including the lobby, lending room, study room, leisure area and other places of the library. As long as you have a mobile phone or a computer, you can connect to this wifi. Moreover, Zhangjiakou Library's wifi signal has a wide coverage and good signal strength, which can meet readers' different online needs.