1, find the village.

2. Find unemployed people (villagers without jobs). The villagers here can't be professional, and the purpose can't be the library management products you can easily buy. His career will not change because of the transaction. Surround it with stones, about three floors (villagers can't jump out).

Put down the bed next to the villager on the platform, so that he can escape. I will still come back to sleep at night. Put down the platform, 1, 2 seconds later, the unemployed will become librarians. Don't deal with him, knock down the podium (the villagers are unemployed again), and then put down the podium, and the villagers become librarians.