![China's unmanned submersible Qianlong 3 to conduct first dive(3/4)](http://www.ecns.cn/hd/2018/04/20/b2b321fdefea4457a0e92b554560ab52.jpg)
An April 15 photo shows Dayang Yihao, which carried the unmanned submersible Qianglong 3 and a research group of 70 people from Xiamen to the South China Sea. (Photo/Xinhua)
An April 15 photo shows Dayang Yihao, which carried the unmanned submersible Qianglong 3 and a research group of 70 people from Xiamen to the South China Sea. (Photo/Xinhua)