ZhongliMore About Zhongli: II Friendship Lv. 3
Have you heard of the origin of the Blackcliff Forge? In the past, they would mine the ore veins of Mt. Tianheng, and then replace the cavities with factory equipment. Tunnels run in all directions throughout the mountain — some even run to the ruins deep within the earth. I doubt there is a person today who could map out all the tunnels.