How about digging the cellar in the master bedroom from the perspective of geomantic omen?

Very bad. The master bedroom is a place to rest, and people's yang becomes dull during rest. If there is a cellar below, it is easy to wake up. If you must dig, dig deeper and farther from the ground. At the same time, the main strata should adopt moisture-proof and moisture-proof materials.

The basement of the building is not counted, because the whole building area is empty below, only one floor, not the master bedroom becomes cloudy.