A child looks at a life-size model of China's manned submersible Jiaolong at the National Maritime Museum of China in North China's Tianjin Municipality on June 9, 2023. Jiaolong set a diving record of 7,062 meters in the Mariana Trench in June 2012, making China the fifth country to obtain the technology to make a submersible dive to more than 3,500 meters below sea level. Photo: VCG