Primary school students play with bubbles at Tianjin Normal University in north China's Tianjin, May 15, 2025. A cultural festival featuring science and innovation kicked off on Thursday at Tianjin Normal University. Students from nine primary schools in Tianjin participated in a science market and watched science plays at the event. (Xinhua/Li Ran)

Primary school students learn about rockets at Tianjin Normal University in north China's Tianjin, May 15, 2025. A cultural festival featuring science and innovation kicked off on Thursday at Tianjin Normal University. Students from nine primary schools in Tianjin participated in a science market and watched science plays at the event. (Xinhua/Li Ran)

Primary school students learn about a robot at Tianjin Normal University in north China's Tianjin, May 15, 2025. A cultural festival featuring science and innovation kicked off on Thursday at Tianjin Normal University. Students from nine primary schools in Tianjin participated in a science market and watched science plays at the event. (Xinhua/Li Ran)

Primary school students fly paper planes at Tianjin Normal University in north China's Tianjin, May 15, 2025. A cultural festival featuring science and innovation kicked off on Thursday at Tianjin Normal University. Students from nine primary schools in Tianjin participated in a science market and watched science plays at the event. (Xinhua/Li Ran)

A science play performed by students of Tianjin Normal University is staged in north China's Tianjin, May 15, 2025. A cultural festival featuring science and innovation kicked off on Thursday at Tianjin Normal University. Students from nine primary schools in Tianjin participated in a science market and watched science plays at the event. (Xinhua/Li Ran)

Editor: Zhang Zhou