(1) In order to be effective, the bookshelf must be placed at a horizontal distance from the enchantment stage 2 and at the same or a square height with it, and the space between the bookshelf and it must be air.

(2) A maximum of 30 bookshelves are needed in the enchantment stage.

(3) That attribute is called accurate acquisition, and it may be enchanted between level 25 and level 75.

The boundary is completely random.

2 1 enchantment effect: the previous numbers are negligible enchantment EID.