This is required by traditional Chinese architectural Feng Shui.
Traditional architectural Feng Shui requires hiding the wind and getting water, which can be interpreted as having a light in front and leaning on the back, or having a mountain on the back and facing water. In other words, in ancient buildings, try to choose a mountain behind and water in front of the door. If the door is far away from the water source, pools, ditches, ponds, etc. must be dug to make up for it.
The ancient house is also called the big house. Ancient house means ancient house, which is built in imitation of the "palace-style" architectural style. This type of building originated during the Guanghua period of Emperor Zhaozong of the Tang Dynasty and is a very distinctive traditional residence in southern Fujian. The ancient houses in Nan'an and Jinjiang in the Quanzhou area are the most famous. In the dialect of southern Fujian, "cuo" means house, and red brick house is a house built with red bricks. It is also the most representative traditional building in southern Fujian.