After making an appointment online. What proof do I need to see a doctor in the hospital? I have made an appointment online.

First of all, you should make sure that the website you reserved is official (recognized by the hospital), and then after the reservation is successful, you will be prompted where to cash your reservation registration form (or make an appointment to hang the number), and bring the identity certificate (ID card and other valid documents) of the registrant to the appointment registration reception desk of the hospital. Now most hospitals have set up an appointment registration reception desk, and then they will tell you what you need to do.