A staff member (L) introduces a U-shaped smart life buoy at the 2024 East Asia Marine Expo in Qingdao, east China's Shandong Province, Oct. 24, 2024. The 2024 East Asia Marine Expo opened Thursday in Qingdao, a coastal city of east China's Shandong Province, convening more than 500 exhibitors from home and abroad. (Xinhua/Li Ziheng)