Do I need to make an appointment to visit Peking University at the age of 4?

Yes According to the query of official website of Peking University,/kloc-people over 0/0 can make an appointment independently, and/kloc-people over 0/6 can make an appointment with at most two peers, and those who make an appointment must enter the school with their peers. /kloc-Children under 0/0 must have parents or guardians to make an appointment and accompany them into the park. Group booking needs to log on to the homepage of Peking University Security Office three working days in advance and make an appointment as required.