Why can't the online enrollment management system of compulsory education schools in Datong be opened? It is because the number of visits is too large, which leads to the server crash of the online enrollment management system of compulsory education schools in Datong, resulting in the system being unusable. You can wait for system maintenance before logging in. Datong, called Yunzhong, Pingcheng and Yunzhou in ancient times, is a prefecture-level city under the jurisdiction of Shanxi Province and one of the sub-central cities of Shanxi Province established by the government.