非金属材料板块12月8日涨0.89%，长江材料领涨，主力资金净流出6739.23万元

Group 1 - The non-metal materials sector increased by 0.89% on December 8, with Changjiang Materials leading the gains [1] - The Shanghai Composite Index closed at 3924.08, up 0.54%, while the Shenzhen Component Index closed at 13329.99, up 1.39% [1] - Key stocks in the non-metal materials sector showed various performance metrics, with Changjiang Materials closing at 26.97, up 3.41% [1] Group 2 - The net capital outflow from the non-metal materials sector was 67.39 million yuan, while retail investors saw a net inflow of 63.30 million yuan [3] - The table of capital flow indicates that institutional investors had a significant outflow, contrasting with the inflow from retail investors [3]