People outside Peking University can queue up at the East Gate (west of Exit A of Peking University East Gate Station of Metro Line 4) with their ID cards or passports. The daily registration time is 8:30- 1 1:30, 14- 17, and there is no charge for registration.
If a student you know leads you, as long as he has a student ID card, you can follow him as a relative at any time, regardless of time limit.
8: 30 am-11:30 pm13: 30 pm-16: 30 during weekends, legal holidays and school summer vacations in Tsinghua University.