China's geomantic omen emphasizes "the mountains are surrounded by water" (that is, there is water in front of the mountains and behind them), which is the best geomantic omen. At this time, man and nature are integrated and develop harmoniously.
Our country lives in the northern hemisphere, and the sun shines from the south, so most of our houses face south (toward the emperor's palace).
In other words, the environment with mountains in the north and rivers in the south is the most ideal place, so it is called Yang, and vice versa.