Can I make a hanging cabinet above the security door, and will it affect Feng Shui?

There is a space of 600mm~800mm above the security door, and the door is generally open to the outside, so many people want to use this space. 1, does not affect the architectural geomantic omen, but improper design affects the feeling when entering the door and affects the overall beauty; 2. The whole wall can be used as a top cabinet or a hanging cabinet, and the thickness should not be too thick, preferably 300mm ~ 400mm3. The inside of the door cannot be used as a corner hanging cabinet.