Tai Po, the hometown of longevity, Tai'an Building is also called Shilou. The main wall of the building is made of stone, or what kind of round pebbles. There are many rooms on the second floor. Each room is a separate single room. The stairs, floors, and protective fences are made of wood. It will ring when walking on it. Especially the rooms in the three directions of the east, south, west and north on the third floor are connected at the back. There are windows at the back of each room for ventilation, you can also look out, or you can close.