Aerial photo taken on Dec. 1, 2019 shows a village surrounded by old tea trees on the Kunlu Mountain in Ning'er County, southwest China's Yunnan Province. More than 10,000 mu (about 667 hectares) of old tea trees are growing in the Kunlu Mountain in Ning'er County, serving as a local pillar industry. (Xinhua/Yang Zongyou)

  The sunset glow is seen over the tea garden on Kunlu Mountain in Ning'er County, southwest China's Yunnan Province, Dec. 1, 2019. More than 10,000 mu (about 667 hectares) of old tea trees are growing in the Kunlu Mountain in Ning'er County, serving as a local pillar industry. (Xinhua/Yang Zongyou)

  The sunset glow is seen over the Kunlu Mountain in Ning'er County of Pu'er City, southwest China's Yunnan Province, Dec. 1, 2019. More than 10,000 mu (about 667 hectares) of old tea trees are growing in the Kunlu Mountain in Ning'er County, serving as a local pillar industry. (Xinhua/Yang Zongyou)

  Photo taken on Dec. 1, 2019 shows a forest of old tea trees in the Kunlu Mountain in Ning'er County, southwest China's Yunnan Province. More than 10,000 mu (about 667 hectares) of old tea trees are growing in the Kunlu Mountain in Ning'er County, serving as a local pillar industry. (Xinhua/Yang Zongyou)

  The sunset glow is seen over the tea garden on Kunlu Mountain in Ning'er County, southwest China's Yunnan Province, Dec. 1, 2019. More than 10,000 mu (about 667 hectares) of old tea trees grow on the Kunlu Mountain in Ning'er County, serving as a local pillar industry. (Xinhua/Yang Zongyou)

  The sunset glow is seen over the Kunlu Mountain in Ning'er County of Pu'er City, southwest China's Yunnan Province, Dec. 1, 2019. More than 10,000 mu (about 667 hectares) of old tea trees are growing in the Kunlu Mountain in Ning'er County, serving as a local pillar industry. (Xinhua/Yang Zongyou)