It is being updated. According to the inquiry of official website of Heyunjiao, Heyunjiao APP is the official mobile app for students brought by the Education Bureau. He Yunjiao can't log in because the system is being updated, and needs to wait for the system update to be completed. The online education platform specially built for Hebi City provides a large number of educational resources, a large number of rich courses and online learning, making online education easier and simpler.