Who named Qin Fangmen?
Qin Fangmen is a scene in the seventeenth episode of A Dream of Red Mansions. A Dream of Red Mansions: Baoyu took a set of Hui Zhen Ji and sat on a stone under the peach blossom beside Qinfang Gate Bridge. He unfolded Hui Zhen Ji and played it carefully from the beginning.
The source of this "Qin Fangquan" actually comes from Yuquan Mountain, so Jia Zheng called Baoyu nonsense. Outside the Forbidden City, there is a moat all around, commonly known as Tongzi River. Heyuan comes from Yuquan Mountain. After being introduced into Beijing, it flows into Jishuitan. One of them flows into Haopu River via Beihai, flows eastward through Jingshan City Wall, flows into the moat in the northwest corner of the Forbidden City, and then flows into the Forbidden City through the trench under the city wall, which is called Neijinshui River. Another tributary flows eastward from Zhongnanhai, passes through Zhongshan Park, and then flows southward to Tiananmen Square. This is the so-called Waijinshui River.
Ancient architecture in China attaches great importance to the context of "water", and Feng Shui requires "water" to come from the dry side and from the fork side. Therefore, the rivers in the Forbidden City must be introduced from the dry side (west) and exported to the fork side (southeast) of the Forbidden City. In addition, among the five elements, the metal is west, so this river is called "Jinshui River".
Neijinshui River flows into the Forbidden City from a ditch in the northwest corner of the Forbidden City. Waterway flows south along the west side of the Forbidden City, through Ciqing Palace Garden Area, the west side of Cining Palace and Cining Palace Garden Area, slightly bends eastward, then flows south through Wuying Hall, then eastward, flows to the front of Taihe Gate, then northward, passes Wenyuan Pavilion, then flows eastward, then turns south, passes through Luan Yiwei, Nanku, exits the trench, and then joins Tongzi River.