煤炭开采板块12月12日跌0.3%，苏能股份领跌，主力资金净流出2.62亿元

Group 1 - The coal mining sector experienced a decline of 0.3% compared to the previous trading day, with Suneng Co., Ltd. leading the losses [1] - The Shanghai Composite Index closed at 3889.35, up by 0.41%, while the Shenzhen Component Index closed at 13258.33, up by 0.84% [1] - A detailed table of individual stock performance within the coal mining sector is provided [1] Group 2 - In terms of capital flow, the coal mining sector saw a net outflow of 262 million yuan from main funds, while retail investors contributed a net inflow of 674 million yuan [2] - The table detailing the capital flow for individual stocks in the coal mining sector is included [2]