as soon as the wind moves forward, clap one hand on the flat wall, the door in the corner of the hall will open silently, and a tunnel with bright lights will be exposed. The winding direction of the tunnel refers to the mausoleum of the first emperor of Qin ten miles away.

the tunnel is paved with green bricks, which is very clean. Even the walls are covered with white tiles. The only thing that makes Yang Tian feel inadequate is that there are no pictures of ladies going out to bath on the walls or of spring palace at night.

the air in the tunnel is very fresh....