People watch a model of Jiaolong, China's deep-sea manned submersible, at the National Maritime Museum of China in Tianjin, north China, June 28, 2024. The National Maritime Museum of China is located in Tianjin Binhai New Area, covering an area of 15 hectares. As the summer vacation approaches, the number of visitors to the museum has increased. (Xinhua/Li Ran)