Network problems or server maintenance. By the end of June 5438+February 30, 2022, Wuhai Professional and Technical Personnel Service Training Network was an online learning website for continuing education and training of professional and technical personnel in Wuhai. In most cases, "My Course" can't be opened because of network delay, which can be solved by changing the network or refreshing the page. It is also possible that the server is under maintenance, and no one can access the website, so it can only be accessed after maintenance. Wuhai, a prefecture-level city under the jurisdiction of Inner Mongolia Autonomous Region, is located in the upper reaches of the Yellow River, bordering Ordos across Gande Mountain in the northeast, Shizuishan City across the river in the south and Alashan League in the west. Located in the depths of the mainland, it belongs to a typical temperate continental climate.