Children representatives from south China's Hainan Province display their investigation results by dancing at the June 1 International Children's Forum held in Beijing, capital of China, on June 1, 2019. About 120 representatives of Chinese and foreign children and teachers took part in the forum on Saturday. (Xinhua/Zhang Yuwei)

A boy from Tianjin displays his investigation results by playing Kuaiban, a form of Chinese storytelling accompanied by bamboo clappers, at the June 1 International Children's Forum held in Beijing, capital of China, on June 1, 2019. About 120 representatives of Chinese and foreign children and teachers took part in the forum on Saturday. (Xinhua/Zhang Yuwei)

Children representatives from east China's Shanghai display their investigation results on wetland ecology at the June 1 International Children's Forum held in Beijing, capital of China, on June 1, 2019. About 120 representatives of Chinese and foreign children and teachers took part in the forum on Saturday. (Xinhua/Zhang Yuwei)

Children representatives from southwest China's Sichuan Province speak at the June 1 International Children's Forum held in Beijing, capital of China, on June 1, 2019. About 120 representatives of Chinese and foreign children and teachers took part in the forum on Saturday. (Xinhua/Zhang Yuwei)

Children representatives from Beijing display their teamwork at the June 1 International Children's Forum held in Beijing on June 1, 2019. About 120 representatives of Chinese and foreign children and teachers took part in the forum on Saturday. (Xinhua/Zhang Yuwei)