Engineer Jiang Sheng (L) and Xiu Keshun make preparations for the 300th dive of China's manned deep-sea submersible Jiaolong in the Western Pacific Ocean, Aug. 18, 2024. Jiaolong, China's manned deep-sea submersible, on Sunday completed its 300th dive since its maiden mission in August 2009. (Xinhua/Wang Yuhao)