It is not recommended that you make such changes. Nowadays, residential buildings are not allowed to install squat toilets because the sewage pipes have not been designed to reverse water. If a squat toilet is installed, the sewage will be released. The sewage pipe radiates out. If you must install a squat toilet, you must backfill 30-40 centimeters of the ground. Install a backwater device at the original sewage outlet to install the squat toilet. Moreover, from the perspective of traditional Feng Shui, the bathroom is higher than the entire room. The height of the ground is very unlucky and will seriously affect the health of your family. Therefore, it is better to install a toilet as much as possible.