Passengers on board China’s first sightseeing submersible “Huandao Jiaolong-1” are sent undersea in Yalong Bay in Sanya City, Hainan Province, on Monday. Being capable of carrying nine people, the submersible was put into trial operation Monday. It can reach a depth of 40 meters undersea. It is the world’s largest completely transparent manned submersible and is a milestone of China’s sightseeing submersible industry. Xinhua