Explanation
In China, showing the soles of your feet is considered deeply insulting because the foot is viewed as the lowest and dirtiest part of the body. This gesture, especially when directed at someone, implies that the person is beneath you or unclean. It is a strong taboo in social settings, particularly when sitting with legs crossed or pointing feet at others.
Local Tip
Always sit with both feet flat on the floor or crossed at the ankles, and never point your feet toward anyone, especially elders or hosts.
How it compares elsewhere
Pointing feet at people or Buddha images is a major insult, as feet are considered the lowest part of the body.
Showing the soles of your feet is highly offensive, as it is seen as a sign of contempt and disrespect.
While not as severe, putting feet on furniture or pointing soles at others can be seen as rude or overly casual in formal settings.