You just need to keep putting the villagers' biological eggs to create a librarian.

1 First of all, we enter the creation mode item column to get villagers' eggs.

2, and then release the villagers continuously.

3, you will find that the librarian is generated.

1. First, open the game and select online customization.

2. Create a room to enter the game. Finally, open the chat box, enter the /op code and become an administrator. Note: I found an option called "Trust the player's permissions", where I can change the player's permissions and become an administrator.