Tianjin Ostar Underwater Vehicles Co plans to develop China’s first-ever manned submersibles for civilian use with Russian scientists by the end of this year. The submersibles would be able to carry between 20 and 40 passengers at depths of up to 24 meters. Two of China’s well-known tourism operators from Zhangjiajie in Hunan province and the Beibu Gulf in southern China have shown interest.