Children learn martial arts during summer vacation in Shahe, north China's Hebei Province, Aug. 9, 2020. (Xinhua/Mou Yu)
Children learn martial arts during summer vacation in Shahe, north China's Hebei Province, Aug. 9, 2020. (Xinhua/Mou Yu)
Children learn martial arts during summer vacation in Shahe, north China's Hebei Province, Aug. 9, 2020. (Xinhua/Mou Yu)
Children learn martial arts during summer vacation in Shahe, north China's Hebei Province, Aug. 9, 2020. (Xinhua/Mou Yu)
Children learn martial arts during summer vacation in Shahe, north China's Hebei Province, Aug. 9, 2020. (Xinhua/Mou Yu)