How much is the cheapest hotel near Tsinghua University?

Of course, it is the dormitory in Tsinghua University!

There are many guest houses in Tsinghua University campus. As far as I know, the cheapest is:

South seventh floor civil air defense guest house:

Double room (without air conditioning): 25 yuan/bed,

Triple room (without air conditioning): 20 yuan/bed.

Tel: 0 10-62782870

In addition, there are:

Xiuchu Guest House:

Quadruple room (air conditioning): 35 yuan/bed,

Quadruple room (non-air-conditioned): 20 yuan/bed.

Tel: 0 10-62773 192

Southwest14th floor:

Quadruple room: 20 yuan/bed.

Tel: 0 10-62773758

Near the southwest gate of Tsinghua University.