在这座海上牧场，大黄鱼住上“健身房”

Group 1 - The core viewpoint of the article highlights the innovative aquaculture practices in Ningde, Fujian, which is the main production area for large yellow croaker in China, accounting for 80% of the national output [1] - Ningde has transitioned from traditional nearshore farming to deep-sea farming, utilizing large circular nets to create a "wild training" environment for the fish [1][3] - The new farming method allows fish to swim freely and feed on natural prey, enhancing their growth and nutritional value [3][5] Group 2 - The establishment of a digital monitoring center enables real-time tracking of water quality and fish health, along with a product traceability system that assigns unique identity tags to each batch of fish [5] - The local industry has seen a significant upgrade, with the export value of Ningde large yellow croaker increasing from 1.13 billion yuan last year to 1.25 billion yuan this year, reaching over 60 countries and regions [9] - The total production of large yellow croaker in Ningde has exceeded 230,000 tons this year, marking a 7% increase year-on-year, with the total industry output value surpassing 20 billion yuan [13]