A child plays rugby at a toy expo in Beijing, capital of China, July 11, 2019. The four-day expo kicked off here Thursday at the National Agriculture Exhibition Center. (Xinhua/Luo Xiaoguang)

Children interact with a dinosaur model at a toy expo in Beijing, capital of China, July 11, 2019. The four-day expo kicked off here Thursday at the National Agriculture Exhibition Center. (Xinhua/Luo Xiaoguang)

Children play at a toy expo in Beijing, capital of China, July 11, 2019. The four-day expo kicked off here Thursday at the National Agriculture Exhibition Center. (Xinhua/Luo Xiaoguang)

Children play at a toy expo in Beijing, capital of China, July 11, 2019. The four-day expo kicked off here Thursday at the National Agriculture Exhibition Center. (Xinhua/Luo Xiaoguang)

Children view exhibits at a toy expo in Beijing, capital of China, July 11, 2019. The four-day expo kicked off here Thursday at the National Agriculture Exhibition Center. (Xinhua/Luo Xiaoguang)

A child assembles toys under the guidance of an exhibitor at a toy expo in Beijing, capital of China, July 11, 2019. The four-day expo kicked off here Thursday at the National Agriculture Exhibition Center. (Xinhua/Luo Xiaoguang)