Aerial photo shows villagers harvesting tea leaves at a tea garden in Bijie, southwest China's Guizhou Province, April 3, 2020. Villagers here are busy harvesting tea ahead of the Qingming Festival to produce the Mingqian (meaning "pre-Qingming") tea, which is made of the very first tea sprouts in spring and considered to be of high quality. [Photo/Xinhua]

Villagers harvest tea leaves at a tea garden in Bijie, southwest China's Guizhou Province, April 3, 2020. Villagers here are busy harvesting tea ahead of the Qingming Festival to produce the Mingqian (meaning "pre-Qingming") tea, which is made of the very first tea sprouts in spring and considered to be of high quality. [Photo/Xinhua]

A staff member shows tea leaves at a plant of a tea making company in Danzhai County of Qiandongnan Miao and Dong Autonomous Prefecture, southwest China's Guizhou Province, April 3, 2020. Tea making companies here are busy producing the Mingqian (meaning "pre-Qingming") tea, which is made of the very first tea sprouts in spring and considered to be of high quality. [Photo/Xinhua]

A staff member processes tea leaves at a plant of a tea making company in Danzhai County of Qiandongnan Miao and Dong Autonomous Prefecture, southwest China's Guizhou Province, April 3, 2020. Tea making companies here are busy producing the Mingqian (meaning "pre-Qingming") tea, which is made of the very first tea sprouts in spring and considered to be of high quality. [Photo/Xinhua]

A staff member prepares tea at a workshop of a tea making company in Danzhai County of Qiandongnan Miao and Dong Autonomous Prefecture, southwest China's Guizhou Province, April 3, 2020. Tea making companies here are busy producing the Mingqian (meaning "pre-Qingming") tea, which is made of the very first tea sprouts in spring and considered to be of high quality. [Photo/Xinhua]

A staff member shows processed tea leaves at a plant of a tea making company in Danzhai County of Qiandongnan Miao and Dong Autonomous Prefecture, southwest China's Guizhou Province, April 3, 2020. Tea making companies here are busy producing the Mingqian (meaning "pre-Qingming") tea, which is made of the very first tea sprouts in spring and considered to be of high quality. [Photo/Xinhua]

Aerial photo shows staff members processing tea leaves at a plant of a tea making company in Danzhai County of Qiandongnan Miao and Dong Autonomous Prefecture, southwest China's Guizhou Province, April 3, 2020. Tea making companies here are busy producing the Mingqian (meaning "pre-Qingming") tea, which is made of the very first tea sprouts in spring and considered to be of high quality. [Photo/Xinhua]

A staff member processes tea leaves at a plant of a tea making company in Danzhai County of Qiandongnan Miao and Dong Autonomous Prefecture, southwest China's Guizhou Province, April 3, 2020. Tea making companies here are busy producing the Mingqian (meaning "pre-Qingming") tea, which is made of the very first tea sprouts in spring and considered to be of high quality. [Photo/Xinhua]

Staff members process tea leaves at a plant of a tea making company in Danzhai County of Qiandongnan Miao and Dong Autonomous Prefecture, southwest China's Guizhou Province, April 3, 2020. Tea making companies here are busy producing the Mingqian (meaning "pre-Qingming") tea, which is made of the very first tea sprouts in spring and considered to be of high quality. [Photo/Xinhua]