An art teacher (C, back) teaches children play African drum at Anci cultural center in the Anci District of Langfang City, north China's Hebei Province, Aug. 16, 2018. Children attend free art classes to enrich their summer vacation. (Xinhua/Liu Xuemin)

An art teacher (1st R) teaches children play African drum at Anci cultural center in the Anci District of Langfang City, north China's Hebei Province, Aug. 16, 2018. Children attend free art classes to enrich their summer vacation. (Xinhua/Liu Xuemin)

Students practice African drum at Anci cultural center in the Anci District of Langfang City, north China's Hebei Province, Aug. 16, 2018. Children attend free art classes to enrich their summer vacation. (Xinhua/Liu Xuemin)

An art teacher (R) teaches children play African drum at Anci cultural center in the Anci District of Langfang City, north China's Hebei Province, Aug. 16, 2018. Children attend free art classes to enrich their summer vacation. (Xinhua/Liu Xuemin)