(Ii) Objectives and tasks. By 2025, 140 pond facilities fisheries farms, 60 factory facilities fisheries farms, 25 saline-alkali land facilities fisheries farms, 40 deeper off-shore sea large-scale intelligent aquaculture farms, 45 central fishing ports and 40 first-class fishing ports will be built.

By 2030, 340 pond facilities fisheries farms, 152 factory facilities fisheries farms, 60 saline-alkali land facilities fisheries farms, 99 deeper off-shore sea large-scale intelligent aquaculture farms, 60 central fishing ports and 80 first-class fishing ports will be built, leading to the standardized transformation of about 17 million mu of ponds nationwide. About 15 million cubic meters of modern industrial aquaculture water bodies were added, the saline-alkali land facility fishery aquaculture area was about 30,000 mu, and the profound sea aquaculture water body was about 5 million cubic meters, basically forming a modern facility fishery development pattern with reasonable layout, wisdom and efficiency, green and safe, and strong security.

(I) the construction of ponds and factory intensive facilities of fish farms

1. Build goals. To promote the standardization of aquaculture ponds and the construction of factory-intensive facilities and fisheries across the country, and build 340 pond facilities and 152 factory-intensive facilities and fisheries farms in the advantageous areas for aquaculture in inland and coastal waters, driving the standardization of ponds across the country of 17 million mu and the addition of 15 million cubic meters of modern industrial aquaculture water bodies. Further improve the comprehensive production capacity, resource utilization rate, facility and equipment level and sustainable development capacity of pond and factory intensive aquaculture, and promote the green and high-quality development of aquaculture.

2. Key construction tasks. In order to optimize the use of beaches in traditional aquaculture areas and accelerate the development of green and efficient intensive aquaculture, speed up the construction of a number of ponds and factory intensive facilities fisheries farms, and promote the facilities aquaculture model such as pond engineering recycling water, factory recycling water, and indoor aquapiculture.

-- Build pond facilities for fishery farms. The implementation of standardized pond transformation, the construction of pond facilities fisheries farm, a single pond concentrated more than 2000 mu, focusing on supporting drainage and water treatment facilities and equipment. Promote the technical model of pond engineered circulating water culture. According to the characteristics of fish, shrimp and crab ponds, water quality control, bottom quality control and accurate control are carried out in the ponds through functional area construction, multi-nutrient level construction, intelligent machinery configuration, etc., to achieve efficient and intensive culture. In the culturing area, ecological purification channels, sedimentation ponds, ecological ponds, composite constructed wetlands and comprehensive farming system of agriculture and fisheries are used to construct ecological purification treatment of aquacultural tail water.

-- Build factory-intensive facilities for fishing farms. According to the standard of 30,000 square meters of workshop area of a single farm, the construction of industrial intensive facility fishery farms, focusing on the precision feeding, classification counting, harvesting and harvesting, water quality monitoring, tail water treatment and other facilities and equipment. Promote the technical model of factory circulating and fish and vegetable symbiotic aquaculture, and realize the recycling of more than 85% of aquaculture water through the integration of water treatment technologies such as physical filtration, biological purification, sterilization and disinfection, degassing and oxygenation.

3. Layout construction. Freshwater ponds and factory intensive facilities are mainly built in Shanghai, Hubei, Hunan, Jiangxi, Anhui, Chongqing, Sichuan, Guizhou, Yunnan, Inner Mongolia, Henan, Ningxia, Shaanxi, Xinjiang, Heilongjiang, Jilin, as well as the inland areas of Hebei, Tianjin, Jiangsu, Zhejiang, Shandong, Liaoning, Guangdong and Guangxi. The construction area of seawater ponds and factory intensive facilities is mainly distributed in the coastal areas of Liaoning, Tianjin, Hebei, Shandong, Jiangsu, Zhejiang, Fujian, Guangdong, Guangxi, Hainan and so on.

 -- Gravity cage culture model. The 50 standard cages with a circumference of 40 meters are a gravity cage facility fishery farm, and the effective aquaculture water body of a single farm is designed to be no less than 30,000 cubic meters, the application of high-strength anti-adhesion net clothing materials, and the key equipment is configured for underwater monitoring, automatic precision feeding, net clothing cleaning, and aquaculture environmental protection.

 -- Truss type cage culture model. The single cage design effective aquaculture water body is not less than 10,000 cubic meters, the application of high-strength anti-adhesion mesh material, focus on remote feed transmission, automatic feeding, dead fish recovery, adult fish automatic gathering, mechanized catching, mesh cleaning, farmed fish and environmental monitoring, clean energy configuration, collision avoidance equipment, safety warning, aquaculture waste collection and other equipment.