The wind in Beijing is mainly northwest wind, and the rivers run from west to east.
Haidian is located at the upwind entrance of Beijing.
The Royal Garden is built in Haidian, and the quality of air and water is easier to ensure.
2. Feng Shui factor
The northwest belongs to the official position, male position, and the royal garden occupies the official position, which is conducive to strengthening the imperial power, which is the so-called official position.