Where does the OL free zone of the Three Kingdoms Group mine?

In Chengdu, Luoyang and Jianye, on the left side of the city, there is an NPC whose name has been forgotten. It has the same name as an NPC in your birthplace (outside the square). He can choose to enter crystal caves and mine caves. Both places are mining. It's best to get a trumpet, learn to break stones, hit them with broken stones, or hit them too slowly, or take a slingshot.

Any level