Amitabha 1) "The first seven days" refers to the seventh day after a person dies: it is generally believed that the soul of the deceased will go home in the first seven days, and the family should prepare a meal for the soul of the deceased before it comes back, and then they must avoid it. The best way is to sleep. If they can't sleep, they should hide under the bed. If the soul of the deceased sees his family, it will make him miss his family and affect his reincarnation. 2) The tail seven is the last seven days of 7749 days after death: the first seven belong to the soul, and the last seven belong to the soul (back to hell or heaven). In ancient times, people kept their bones at home for 49 days and then buried them for their relatives. During the 49-day mourning period, they are not allowed to go to any family, so people who see white things will avoid it and be surprised if they have good intentions.