Gu Zhonggen (L) and two volunteers prepare at his free herbal tea stall in Shangcheng District of Hangzhou, capital of east China's Zhejiang Province, July 14, 2019. Gu Zhonggen, 81, set up a herbal tea stall near a bus stop 42 years ago to offer free tea during summer time. (Xinhua/Han Chuanhao)