Despite the goals of the Chinese government to carry out fisherman relocations, reduce the numbers of fisheries, and to control the numbers of fishing vessels and their total engine
power,the number of fishers tripled from about 1,224,000 in 1980 to 3,690,000 in 2011(Fig. 2a). Although the number of fishing vessels has been declining in the past ten years, their total engine power is still showing a rising trend (Fig. 2b).