Regarding the Heaven and Earth Vault, I personally think it's a bit professional. But the biggest challenge in writing such a book is the knowledge of Feng Shui. Lao Niu is not a feng shui master, and he will not be exposed to feng shui on weekdays, and the most important thing when writing a book is to reserve knowledge, and he has to read various materials every day. As I write now, my knowledge reserve is suddenly a little insufficient. Today, I will make a change first, and Lao Niu will take the opportunity to do more knowledge reserves. I'm sorry for the impact on reading! It's been two months since I wrote the book, and I'm very grateful to my friends for their continued support. Although the results are not good, in the eyes of Lao Niu himself, they are not bad. So Lao Niu will continue to write anyway and finish the book according to the original idea. Thank you! The text has been updated.