Network problems. The tax reservation in Haidian cannot be made due to network problems. No network, poor network, unable to make an appointment online. You can switch to a stable network and try again. Haidian, belonging to Beijing, is located in the west and northwest of Beijing, bordering Xicheng District and Chaoyang District in the east, Fengtai District in the south, Shijingshan District and Mentougou District in the west and Changping District in the north.