Introduction to Dongmen Guanlou: It is a retro building built in 1992. The original Guanlou no longer exists. It is now a three-story mountaintop-style building with double doors and double buildings. Each roof is decorated with a red phoenix, so it is also called "Danfeng Tower". The building is 71.2 meters long from north to south and 21.5 meters high. It is concave in shape and faces west to east, controlling the main entrance to the customs.