1. This is a Feng Shui term, which means:
(If) there is something improperly arranged at home or in the cemetery, it will harm the children at home.
2. Here is an example, please refer to:
Jiazi Day mainly damages girls with small mouths. Yi Chou committed three kills every day. On the Bingyin day in the underworld, when the day is small and the day is small, it is said that the person is orphaned, widowed, and in danger of pregnancy. On the day of Ding Mao, there will be less good and more bad luck, but if the combination is appropriate, it will not be a big harm. On the Wuchen day, people hanged themselves because of falling injuries, blindness, lameness, and epidemic diseases.