(250710) -- QINGDAO, July 10, 2025 (Xinhua) -- An aerial drone photo taken on July 10, 2025 shows motorboats participating in a sea cruising event in Laolong Bay area in Qingdao, east China's Shandong Province. A sea cruising event was held in the coastal city of Qingdao on Thursday to celebrate the 20th anniversary of the establishment of the Maritime Day of China and the 620th anniversary of Chinese explorer Zheng He's maritime voyages. (Xinhua/Li Ziheng)