What does it mean that "going to the grave is not good" is often used in the course selection of Chen Zixing?

Entering the tomb will have a bad influence. Luo Lihua, the author of Chen Zixing, has many ways to choose a date, and many books have different views. As a teacher of choosing a day, he must read a lot of opinions to distinguish the severity of god killing from the weather. The disadvantage of entering the tomb is that you can't enter the tomb, which will have adverse effects. Only in this way can human life be truly auspicious, auspicious, and can drive away good luck and avoid evil, and truly benefit human society.