In traditional folk culture, it is not suitable to go out on the seventh day of the seventh lunar month, and you can't get home on the eighth day, which is the so-called "seven don't go out, eight don't go home". The original intention of not going out is that men should go out and work hard. First of all, they should stabilize the rear. Seven kinds of "rice, oil, salt, sauce and vinegar tea" at home must be prepared before going out, that is, to tell everyone that the elderly and children at home should settle down before going out. Nowadays, many people think that they don't go out for seven days, such as July 17, which refers to the lunar calendar. They think it is unlucky to go out these days. Therefore, according to the folk saying, 17, 27 is not suitable for travel.