Participants visit the China Study Tour and Education Industry Expo at Qingdao International Conference Center in Qingdao, east China's Shandong Province, July 3, 2026. The expo opened in Qingdao on Friday, attracting exhibitors of study tour field from across the country. (Xinhua/Li Ziheng)

　　A humanoid robot provides service for participants during the China Study Tour and Education Industry Expo at Qingdao International Conference Center in Qingdao, east China's Shandong Province, July 3, 2026. The expo opened in Qingdao on Friday, attracting exhibitors of study tour field from across the country. (Xinhua/Li Ziheng)

　　A boy operates a train model under the guidance of a staff member during the China Study Tour and Education Industry Expo at Qingdao International Conference Center in Qingdao, east China's Shandong Province, July 3, 2026. The expo opened in Qingdao on Friday, attracting exhibitors of study tour field from across the country. (Xinhua/Li Ziheng)