The picture below shows a typical three-in-one board. The three plates of heaven, earth and man are all twenty-four mountains, and the location is vertical, which is located in the innermost layer (the picture below does not count Tianchi, the fourth floor is counted from the inside).
The human plate is the seventh floor, turning 7.5 degrees counterclockwise from the site to eliminate sand.
The ceiling is the eleventh floor, 7.5 degrees clockwise than the construction site, using water.