Why does monk Lao Dao know divination?

Because some people have clairvoyance, telepathy, fatalism and so on. These are magical powers, so they are actually not counting, but seeing what you can't see. However, these are all from generation to generation or from this life.

If the landlord is interested, he can learn about Buddhism. But after you understand Buddhism, you will know that it is useless to have magical powers. If used improperly, it will be beneficial to yourself and others, because magical powers are not equal to cause and effect.

The landlord can casually visit the Earth Treasure King Post Bar first, and then learn Buddhism slowly if he is interested.