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The demand for marine products in China is expected to be a continuous rising trend in the next 20 years. In the context of the declining fishery resources and limited development of offshore marine product development, deep-sea cage farming has become an inevitable option for China’s marine fishery development. Starting from multiple aspects including equipment development, supporting technologies, brand structure and industrialization, the status quo of deep-sea cage farming of China is analyzed in this paper, and issues existed in development are also elaborated. This paper believes that to promote the development of deep-sea cage farming of China, cage farming and supporting technologies shall be improved, the industry chain shall be perfected, the industrialization shall be lifted, and government services and management shall be given to play. 1. Research Background The marine aquaculture in China has made substantial achievements ever since the “raising first” guideline has been determined for the fishery industry. In 2016, the total output of China’s marine aquaculture is 19.6313 million tons, the total output value is 314.039 billion RMB, and the total export volume of marine products is 8.2791 million tons, indicating the important role of China in the world’s marine aquaculture industry [1]. However, the marine aquaculture in China is mainly concentrated in bays, mud flats and offshore waters and the use ratio of deep sea aquaculture space is extremely low (Wang Dongshi et al., 2015). Therefore, it is one of China’s marine aquaculture industry development strategies to vigorously develop deep sea cage aquaculture and industrialized marine aquaculture (Chen Yusheng, 2012). In the context of the new era where the important strategy “blue granary” is proposed, deep sea cage aquaculture becomes one of the critical options for the expansion of marine aquaculture space, which is even more prominently significant to promote it and develop it [2]. Deep sea cage aquaculture refers to a kind of offshore marine aquaculture in deep sea, which normally uses a cage that consists net rack, netting, floating device and anchor device, with supporting measures such as bait-casting system, underwater monitoring system, and disease prevention system. As an advanced marine aquaculture method, deep sea cage aquaculture indicates that the industry of China is becoming intensifying. Large-scale deep sea appeared in late 20th century in China when a number of large stormproof deep-water cages were imported from Norway to Hainan (HDPE model). Deep sea cage aquaculture is of a series of advantages. It expands the farming space, protects and improves the marine environment, increases production efficiency and product quality, encourages fishermen to join the industry, and increases their income etc. Currently, there are numerous shortcomings in China’s deep-sea cage aquaculture such as technologies, personnel training, relevant policy support and management policies, all of which have been impeding the forming and development of the deep-sea cage aquaculture industry chain. Existing literatures mainly focus on technological analysis in terms of deep sea cage aquaculture, and the research literature regarding the personnel training and management mechanism of deep sea cage aquaculture are still lacking. Based on that, the status quo and existing issues of China’s 2018 2nd International Conference on Social Sciences, Arts and Humanities (SSAH 2018) Copyright © (2018) Francis Academic Press, UK 373 deep-sea cage aquaculture are analyzed in this paper in combination of the development experiences and inspirations of deep sea cage aquaculture in foreign countries, offering policy references for the future development of China’s deep-sea cage aquaculture 2. Status Quo and Issues of Deep Sea Aquaculture Equipment Development of China Deep sea cage aquaculture is an imported technology. China has achieved substantial progress yet certain issues still exist, which are mainly manifested in the following aspects. 2.1 The technological innovation of farming cage shall be strengthened immediately Cage is the support and carrier of deep sea box-based aquaculture system, and a decisive factor that determines farming efficiency. What’s more, it is the key controlling point about whether the farming is successful. Most cages used in early days were imported from foreign countries. As we became more experienced and learned advanced experiences of other countries, however, the production of the main body of cages has realized localization. But the cages manufactured in China are still lagging traditional aquaculture powers in terms of materials, design concepts and precision. Essentially speaking, such gap is led by two reasons. First, compared with those countries which are known for cage manufacturing, China’s development history is shorter, and we are still probing some core technologies and ideas. In addition, China is a country of vast waters where northern and southern water bodies are greatly varied, and the underwater conditions are complicated and variant. Also, different cages shall be used in different provinces, making the research even more difficult. Second, the R&D of technological products in today’s market-oriented economy is under the influence of market demands, and the cost of technological innovation is not entirely directly proportional to user experiences and returns. The users of deep sea aquaculture cages pursue profits, while high costs of purchase and use are also an adverse factor that prevents the industry from becoming large scale. Therefore, it is an important direction for China’s cage research in the future to develop practical and technologically innovative cages that suit the situations of China on the basis of cost control [3]. 2.2 The cage research and development shall be attached with importance and existing supporting technologies are relatively backward The research and development of deep sea cage in China have been making new achievements continuously since the “deep sea stormproof cage development” project has already been listed as one of the national hi-tech R&D plan (the “863” plan) in early days. Some of the technologies have reached international advanced level. For example, in 2012, the development and application project of deep sea stormproof cage, a project undertaken by South China Sea Fisheries Institute of CAFS, has reached international advanced level, which has bridged several technological gaps in China. But the project result is difficult to be promoted due to high cost. Deep sea cage aquaculture is a comprehensive system consisted of cage and supporting facilities, so the perfection and improvement of such supporting facilities may directly improve aquaculture production efficiency. Currently, the deep-sea aquaculture equipment of China is merely being experimented and tested in certain deep-sea cage aquaculture bases (Chen Fuxiao et al., 2015), and they are not commonly promoted in the country’s deep-sea cage aquaculture industry. 2.3 The species are not diverse, and without famous brand The species of marine fishes in China are multitudinous, yet few of them suit deep sea cage aquaculture. The traits of certain species even decline due to limited breeding and farming conditions. The species that are suitable to deep sea cage aquaculture often come with following features, which are of larger size, quicker growth, better meat quality, broader sources of baits, and large market demand. Main breeds today haven’t gone through selection, purification and rejuvenation, so some of them are of poorer meat quality. In addition, as a result of the backward fry rearing application in China, there isn’t any famous brand, hence no competitiveness in international market. China enjoys

The Status Quo, Issues and Foreign Experiences of Deep Sea Aquaculture Equipment of China