Excuse me, what does it mean that there is a "closed day" in Luojia Meteorological Handbook?

This is a special term for geographical date selection, and the full name is: "Ice collapse will destroy the door." Generally speaking, people who are not comparable to those who make a living by profession should not delve into what this means. This is not clear in one or two sentences. The reason why it is called this terrible name is just to remind people that the geographical choice is very cautious, and it is a great disaster to build the wrong place and choose the wrong day! There is such an example. For example, if the year is flat for two days, it is called ice collapse, also called death evil spirit. It means short life, fear of peace and fear of burial. For example, if it is not a year, it will be in silver moon. The day of extinction is the fourth day in silver moon, Uzuki, and it is also the day of dawn in .............. Hehe, every month is the day of extinction. The day to avoid destruction is the day of disaster. For example, in the first month of the first lunar month, Yihai rushed to destroy the door, and then Yihai was the day of great disaster. Similarly, Uzuki C-Zi's Killing Day! It's the day when ugly people were killed ... Hehe, there are many more, so I won't list them one by one. In short, the ancient autocratic imperial power, civilians can not bury the sky indiscriminately. Killing people in the wrong way is still a trivial matter, killing nine talents is a big deal! Of course, times have changed, so we can't forget the past ... it's scary to talk about it today!