Haidian hotel. The underground restaurant of Beihang Zhizhen Building is Haidian Restaurant. Zhizhen Building is located in the southeast corner of Beihang School, with a total construction area of 227,000 square meters. The main building has 24 floors above ground and 4 floors underground, with a height of 99 meters. Zhizhen Building is the second phase of the new development of Beihang Science Park. Located at No.7 Zhichun Road, Haidian District, the southeast corner of Beihang Campus, with a total construction area of 225,000 square meters.