Pupils receive stationery from volunteers in the Primary School of Antai Village in Rong'an County, south China's Guangxi Zhuang Autonomous Region, May 29, 2015. The International Children's Day will fall on June 1.(Xinhua/Lai Liusheng)

A volunteer plays saxophone for students in the Special Education Center of Tengzhou City in east China's Shandong Province, May 29, 2015. The International Children's Day will fall on June 1.(Xinhua/Song Haicun)

Pupils of Tashan Central Primary School receive new books in Lianyungang City, east China's Jiangsu Province, May 29, 2015. The International Children's Day will fall on June 1.(Xinhua/Si Wei)

Students play games in a new campus in Yinan County in east China's Shandong Province, May 29, 2015. The International Children's Day will fall on June 1.(Xinhua/Du Yubao)

A left-behind child receives presents from volunteers in a community of Handan City, north China's Hebei Province, May 28, 2015. The International Children's Day will fall on June 1.(Xinhua/Hao Qunying)

Pupils of Yaogou Primary School receive new schoolbags in Lintao County, northwest China's Gansu Province, May 29, 2015. The International Children's Day will fall on June 1.(Xinhua/Wang Kexian)

Children and parents take part in a charity activity in Kindergarten of Dongxiang County, east China's Jiangxi Province, May 28, 2015. The International Children's Day will fall on June 1.(Xinhua/He Jianghua)

A student performs with her robot during a ceremony celebrating the coming Children's Day in the branch school of Beijing No.2 Middle School in Beijing, capital of China, May 29, 2015. Students from the 1st grade in junior high school spent their last Children's Day here with teachers and parents. (Xinhua/Wu Xiaoling)

Students perform during a ceremony celebrating the coming Children's Day in the branch school of Beijing No.2 Middle School in Beijing, capital of China, May 29, 2015. Students from the 1st grade in junior high school spent their last Children's Day here with teachers and parents. (Xinhua/Wu Xiaoling)

Students waver hands after performance during a ceremony celebrating the coming Children's Day in the branch school of Beijing No.2 Middle School in Beijing, capital of China, May 29, 2015. Students from the 1st grade in junior high school spent their last Children's Day here with teachers and parents. (Xinhua/Wu Xiaoling)

Students and parents share letters for each other during a ceremony celebrating the coming Children's Day in the branch school of Beijing No.2 Middle School in Beijing, capital of China, May 29, 2015. Students from the 1st grade in junior high school spent their last Children's Day here with teachers and parents. (Xinhua/Wu Xiaoling)