Hikers walk along a section of an ancient Tea Horse Road of Daxiangling in Yingjing County, southwest China's Sichuan Province, April 18, 2021. Yingjing County has been trying to promote its tourist industry by taking advantage of its rich forest resources. (Xinhua/Jiang Hongjing)

Hikers walk along a section of an ancient Tea Horse Road of Daxiangling in Yingjing County, southwest China's Sichuan Province, April 18, 2021. Yingjing County has been trying to promote its tourist industry by taking advantage of its rich forest resources. (Xinhua/Jiang Hongjing)

Hikers walk along a section of an ancient Tea Horse Road of Daxiangling in Yingjing County, southwest China's Sichuan Province, April 18, 2021. Yingjing County has been trying to promote its tourist industry by taking advantage of its rich forest resources. (Xinhua/Jiang Hongjing)

Hikers walk along a section of an ancient Tea Horse Road of Daxiangling in Yingjing County, southwest China's Sichuan Province, April 18, 2021. Yingjing County has been trying to promote its tourist industry by taking advantage of its rich forest resources. (Xinhua/Jiang Hongjing)

Aerial photo taken on April 18, 2021 shows people riding in Longcanggou National Forest Park in Yingjing County, southwest China's Sichuan Province. Yingjing County has been trying to promote its tourist industry by taking advantage of its rich forest resources. (Xinhua/Jiang Hongjing)

Aerial photo taken on April 18, 2021 shows hikers walking along a section of ancient Tea Horse Road of Daxiangling in Yingjing County, southwest China's Sichuan Province. Yingjing County has been trying to promote its tourist industry by taking advantage of its rich forest resources. (Xinhua/Jiang Hongjing)

Aerial photo taken on April 18, 2021 shows hikers walking along a section of ancient Tea Horse Road of Daxiangling in Yingjing County, southwest China's Sichuan Province. Yingjing County has been trying to promote its tourist industry by taking advantage of its rich forest resources. (Xinhua/Jiang Hongjing)