"Sitting on the kang and hanging relatives on the threshold" means that relatives are tired and angry when they can't walk well. If you don't mean it, your relatives will never leave. If you are seriously ill, you would rather spend money than try not to touch it.

Nowadays, many people in society are reluctant to visit relatives, because many relatives are either far away or not many, and it is often neighbors or friends who give us the most timely help. Relatives compare with each other, and don't want their good attitude to make many young people farther away from their relatives.