Pupils assemble robots at Beiling Central Primary School in Qiuxian County, north China's Hebei Province on May 10, 2019. This primary school has integrated technology innovation into class, and created science lessons on robots. (Xinhua/Zhu Xudong)

A pupil assembles a robot at Beiling Central Primary School in Qiuxian County, north China's Hebei Province on May 10, 2019. This primary school has integrated technology innovation into class, and created science lessons on robots. (Xinhua/Zhu Xudong)

A pupil assembles a robot at Beiling Central Primary School in Qiuxian County, north China's Hebei Province on May 10, 2019. This primary school has integrated technology innovation into class, and created science lessons on robots. (Xinhua/Zhu Xudong)

A pupil tests a robot at Beiling Central Primary School in Qiuxian County, north China's Hebei Province on May 10, 2019. This primary school has integrated technology innovation into class, and created science lessons on robots. (Xinhua/Zhu Xudong)

A teacher introduces the assembly of robots to pupils at Beiling Central Primary School in Qiuxian County, north China's Hebei Province on May 10, 2019. This primary school has integrated technology innovation into class, and created science lessons on robots. (Xinhua/Zhu Xudong)