At that time, there was a book called Lu Ban Shu, which was said to have been written by Lu Ban, but some people said that the specific author did not know. This book is divided into two volumes, Lu Ban Shu. If it is really written by Lu Ban, they say that the best policy is to teach people how to build houses and how to make wooden things, that is, to teach people how to make handicrafts and how to live. However, I found that the second volume of this book was mixed with some superstitious things, so that few people have read the second volume in modern times.
It is said that Lu Ban was in the second book for some reason, just to talk about some superstitious things. Most of them teach people how to harm others, and rarely teach people how to save others. So the second volume of Lu Ban's book was lost, collected or destroyed. At that time, there was a story in this book, which said that Lu Ban went to a far place for further study while studying this book, but his wife was pregnant at that time, and Lu Ban missed his wife very much. In this book, he made a paper bird and said a spell. This bird has become a real big bird. Take him home to see his wife.
At that time, his wife was very curious, so she learned to recite spells from Lu Ban while he was asleep. Then, his wife was taken to the sky by the bird, because his wife was going to give birth, blood dripped on the bird, sacred things were infected, and his wife and children fell from the sky and died. Therefore, Lu Ban said that if you want to learn this book, you must first leave it behind.