It doesn't matter. The order of appointments depends on your previous appointment time. The registration network of Xijing Hospital will be posted at 4 pm, and your appointment has already been arranged.

However, it is recommended to get the number early, because it takes a long time to get the number from the self-service machine. If you pass this number, you may be arranged in the back. A little advice, there are many people on the number pick-up machine on the first and second floors, but the more people on the floors, the less. You can pick up the number first and then check the queue.