Sangong: the general name of the three highest official positions in ancient times, with different interpretations in different periods. Please see:
There are two opinions about the three fairs in the Zhou Dynasty: (1) Sima, Situ and Sikong. (2) Taishi, Taifu and Taibao.
Western Han Dynasty: Prime Minister (Da Situ), Tai Wei (Fu) and Imperial Physician (Da).
Eastern Han Dynasty: Qiu, Situ,.
Ming and Qing Dynasties: Taishi, Taifu and Taibao.
To sum up, it refers to senior officials!
And the two rivers, there are two big rivers embracing each other!
In other words, there is a treasure house for high officials!
Simply put, this is a treasure trove of feng shui that can protect future generations!