This is the oldest factory in the locomotive factory. It has been well preserved since the Qing Dynasty. The machines and equipment are all in the same way at the time of production. There are two huge windows on the front of the factory, which can be seen from the outside.

The shadow of the behavior of the experiencer standing in front of the window will be captured by the camera and be frozen in the picture at a certain time. After the experience, the shadow still exists. The shadow of the new experiencer is superimposed with the former who echoed the different people with different stories overlaping at a same space.