Farmers pick tea leaves at a tea base in Xiakou Village of Jiuwanxi Town in Zigui County, central China's Hubei Province, April 1, 2019. Farmers are busy with tea picking and processing as local peak harvest season approaches. Tea industry has helped to increase local farmers' income. (Xinhua/Lei Yong)

A worker operates a machine to process tea leaves at a plant in Zigui County, central China's Hubei Province, April 2, 2019. Farmers are busy with tea picking and processing as local peak harvest season approaches. Tea industry has helped to increase local farmers' income. (Xinhua/Lei Yong)

Farmers pick tea leaves at a tea base in Xiakou Village of Jiuwanxi Town in Zigui County, central China's Hubei Province, April 1, 2019. Farmers are busy with tea picking and processing as local peak harvest season approaches. Tea industry has helped to increase local farmers' income. (Xinhua/Lei Yong)

Aerial photo taken on April 1, 2019 shows a tea base in Xiakou Village of Jiuwanxi Town in Zigui County, central China's Hubei Province, April 1, 2019. Farmers are busy with tea picking and processing as local peak harvest season approaches. Tea industry has helped to increase local farmers' income. (Xinhua/Wang Gang)