A volunteer explains the structure and function of ears for children in Yangzhou, east China's Jiangsu Province, March 2, 2022. March 3 marks China's national Ear Care Day. Various activities were held to promote public awareness of hearing protection.(Photo: Xinhua)

Children learn ear-protecting tips at a kindergarten in Handan, north China's Hebei Province, March 2, 2022. March 3 marks China's national Ear Care Day. Various activities were held to promote public awareness of hearing protection.(Photo: Xinhua)

A medical worker examines a child's ears in Yuqing County, Zunyi City, southwest China's Guizhou Province, March 2, 2022. March 3 marks China's national Ear Care Day. Various activities were held to promote public awareness of hearing protection.(Photo: Xinhua)

A medical worker explains the structure of ears in Zhongguan Township, Deqing County, Huzhou City, east China's Zhejiang Province, March 2, 2022. March 3 marks China's national Ear Care Day. Various activities were held to promote public awareness of hearing protection.(Photo: Xinhua)