Introduction to the Book Cave: Not far to the north of Shengchang Temple is the "Book Cave", which is about 4 or 5 square meters in size. It looks like a naturally formed cave. You need to go down to enter. It is very flat inside, but it is very moist. . If Confucius had chosen this hole to store books, most of the bamboo pieces would have become moldy and scattered, and he would have had to go to the "book drying field" to dry them every two days.