Tourists stay in Tsinghua University.

If you have relatives studying or working in Tsinghua, you can use their student ID cards or work permits as proof, and then you can stay on campus. Building 19 on campus is a special hotel, which is open to teachers, students, relatives and friends in Tsinghua.

If you don't have it, you can't stay on campus. You can stay at the tsinghua campus Hotel outside the East Gate of Tsinghua or the hotel directly opposite the South Gate of Tsinghua. Generally, the price is above 2 yuan (for two people). You can get all the information including the phone number by searching.