A tea-picking worker harvests tea leaves at a tea garden in Longjing Village of Hangzhou, east China's Zhejiang Province, March 18, 2020. Farmers and tea-picking workers have started to harvest the first batch of Xihu Longjing, or the West Lake Dragon Well tea, in Hangzhou. Zhejiang Province, a major tea production base in east China, has adopted big data to accurately forecast the proper time for harvesting tea leaves to mitigate the impact of labor shortage caused by the epidemic.[Photo/Xinhua]