Photo taken on July 4, 2014 shows Jiaolong, China's first manned deep-sea submersible, on its carrier Xiangyanghong 09 in Fuzhou, capital of southeast China's Fujian Province. Jiaolong on Friday embarked on a scientific expedition in the Pacific Ocean. It is scheduled for a voyage in the northwest Pacific Ocean, during which it will research cobalt-rich crusts and life forms inhabiting the bottom of the sea. (Xinhua/Luo Sha)