Sent out by Institute of Acoustics, 6 crew members of Jiao long -- China's deep-sea submersible, has completed their 5000-meter experimental exploration mission and returned Beijing, Aug 19.

Director WANG Xiaomin  welcomed the members with flowers and shook hands with each member. He congratulated them for the successful experiment and expressed his heartfelt thanks. Deputy Director JU Qi joined the welcome-back ceremony in Jiangyin, Jiangsu Province, Aug 18.

China's deep-sea submersible , the Jiaolong, had started off on July 11, 2011 and reached depths of 4027 meters, 5057 meters, 5188 meters, 5184 meters and 5180 meters respectively in 49 days.

During its million-mile sea journey, It achieved a lot visual information and near-bottom micro-topography measurements, testified submersible's functional and operational performance in deep underwater environment, achieved a breakthrough in China's manned deep diving, indicates china being able to operate in over 70% of the global sea. The incident marks another milestone in china's marine technology history.