Introduction to Yelang Ancient Kingdom: Datiguan, which is shaped like a bag mouth, is an important relic of Yelang Ancient Kingdom. There are four eye-catching characters "Yanjiang Key" on the cliff beside the road. It is said that it is the entrance and exit of Yelang Kingdom. must pass through. According to historical records, Yelang was close to the Zangqi River. In the first year of Emperor Yuanfeng of Han Dynasty (110 BC), the central government established Zangqi County in Guizhou. After the death of Yelang, most of the area came under the jurisdiction of Zangqi.