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A medical volunteer performs an ear canal test on a senior citizen during a charity event held in Fengtai District of Beijing, capital of China, March 3, 2019, China's National Ear Care Day. (Xinhua/Li Xin)
A medical volunteer performs an ear canal test on a senior citizen during a charity event held in Fengtai District of Beijing, capital of China, March 3, 2019, China's National Ear Care Day. (Xinhua/Li Xin)