Photo taken on December 8, 2017 shows the world's first semi-submersible intelligent marine fishing ground in the Norwegian Sea. The main body structure and system assembly of the fishing ground were completed in China, which demonstrated China's capability in high-end equipment development for deep-sea aquaculture. Regarded as the world's largest aquaculture support vessel, the fishing ground was delivered by China to Norwegian clients in Qingdao, east China's Shandong Province on June 3, 2017. (Photo/Xinhua)
