From today to the official start of classes, primary and junior high school students will have classes at 8:00- 12:00 every morning and 14:00- 18:00 every afternoon, with each class lasting 20 minutes. The TV "Classroom in the Air" course will be broadcast simultaneously on Ningxia Education Channel and Ningxia Children's Channel. According to the course category and study period, primary and junior high school students have classes at 8: 00 am-12: 00 am and at14: 00 pm-18: 00 pm every day, with each class lasting 20 minutes. The TV "Classroom in the Air" course is broadcast simultaneously on Ningxia Education Channel and Ningxia Children's Channel. According to the course category and study time, Ningxia Education Channel mainly