Is it good to have a mountain behind the living room

As long as the waterproofing is done well, there is no problem.

It is recommended that you do not hang a mirror behind the sofa, because putting a mirror behind the sofa is unstable and your career is not going well in feng shui. Usually some calligraphy and paintings with good meanings can be hung behind the sofa, such as landscape paintings, calligraphy paintings, or peony paintings, etc., which can also play a decorative role.

Shift the back frame of the bed and place it next to the head of the bed as a bedside table, so that you can sleep with a solid heart and no worries;

I haven't heard of anything bad about the toilet door facing the mountain, but there is a saying in feng shui that the toilet door is bad for the door and the bedroom door. Let me tell you about the feng shui problem of flushing the toilet door at the entrance door. >>>More

It's not good, it's easy to cause eye strain.

There should be no light band at the head of the bed. Affects health. >>>More