What artificial designs are sitting postures used for?

it may be comfortable to fill the whole chair when you are seated, but it is not appropriate.

If the chair is full, the body must be close to the back of the chair and lean back slightly. This posture looks lazy and a little conceited. If you sit like this when receiving guests, guests will be unhappy because they feel slighted; Sit like this when you are a guest, and the host will be unhappy because you are too casual; Sitting like this in recruitment, you may drive a very good talent away; Sitting like this in an interview, you may be "sentenced to death" by a rare boss. It's not impolite to be alone at home, or to talk privately with close friends and relatives, and to fill the chair. However, it is not only disrespectful to others, but also irresponsible to your own image to face people you are not familiar with, or to sit full of chairs in public, workplace and social occasions.