Tsinghua Campus is the second school gate in Tsinghua University. The predecessor of Tsinghua Campus is the Royal Garden Kangxi Palace (Royal Garden) Xichun Garden, which was built in1767; After Xianfeng acceded to the throne, Xichun Garden was changed to "Tsinghua Campus". Tsinghua campus archway is a classical and elegant "archway" building with blue bricks and white columns and three archways. Built in 1909, the lintel is engraved with three characters "Tsinghua Campus", which was inscribed by Na Tong, Minister of Military Affairs of Qing Dynasty, in 19 1 year. "