Various activities were arranged for children who came to Shanghai to meet their parents during summer vacation. (Photos: Xinhua)

Children of migrant workers practice at a martial arts lesson in Nanxiang development zone of Jiading District in Shanghai, east China, July 15, 2019.

Children of migrant workers take a handicraft lesson in Nanxiang development zone of Jiading District in Shanghai, east China, July 11, 2019.

Children of migrant workers practice at a martial arts lesson in Nanxiang development zone of Jiading District in Shanghai, east China, July 15, 2019.

Children of migrant workers warm up before a martial arts lesson in Nanxiang development zone of Jiading District in Shanghai, east China, July 15, 2019.

Children of migrant workers practice at a martial arts lesson in Nanxiang development zone of Jiading District in Shanghai, east China, July 15, 2019.