Can the bathroom of the commercial storefront on the first floor not be equipotential connected?

At least seven groups. There is generally no toilet on the first floor of the mall (if the mall is of a high grade, you can consider setting up one). Two to three floors with two groups each. >>>More

All equipotentials are connected to the ground of the building, so the first floor must be connected to the top floor, and if not, it must be a false grounding made by the construction party.

The key is whether the orientation with the bathroom is appropriate, and there is no problem with the door facing in the middle or on the side. As long as it's not opposite the kitchen door and the entrance door.

The waterproofing of the bathroom is to ensure that after moving in, the water will not leak downstairs and will not penetrate into the wall, so as to ensure that the wall does not become moldy and the neighborhood is in harmony. >>>More

I don't know much about feng shui, but you must do a good job of waterproofing upstairs, otherwise the leakage will drip directly on your face...