Actually, I have some suggestions:
1. If you can't put the zither obliquely from top to bottom, you can put it like this when you play the piano, and stand it up when you don't play, which is a bit troublesome, but that's what I did when I was in the student dormitory, no problem.
2. If you must put it on the bed, you can put the high guzheng stand on the bed with wood or books (you can't block the pronunciation hole), and then move the bench and sit by the bed to play.
But theoretically, it's okay to hit the leg ..