(221201) -- CHENGDU, Dec. 1, 2022 (Xinhua) -- This aerial photo taken on March 30, 2022 shows tea farmers in cooperation with Zhang Yuehua picking fresh tea leaves at a tea garden in Mingshan District of Ya'an City, southwest China's Sichuan Province. Zhang, born in 1959, is a representative inheritor of green tea making technique. Boasting a long history of tea cultivation, Ya'an is the birthplace of dark tea and green tea making techniques. Inherited by generations of tea makers, both techniques are now listed as national-level intangible cultural heritage. (Xinhua/Shen Bohan)