海洋经济板块2月5日跌1.9%，中天科技领跌，主力资金净流出31.18亿元

Group 1 - The marine economy sector declined by 1.9% compared to the previous trading day, with Zhongtian Technology leading the decline [1] - The Shanghai Composite Index closed at 4075.92, down 0.64%, while the Shenzhen Component Index closed at 13952.71, down 1.44% [1] - The net outflow of main funds in the marine economy sector was 3.118 billion yuan, while retail investors saw a net inflow of 2.732 billion yuan [1] Group 2 - The net inflow of funds from speculative investors in the marine economy sector was 387 million yuan [1] - Detailed fund flow for individual stocks in the marine economy sector is available in the accompanying table [1]