包装印刷板块12月18日涨1.12%，柏星龙领涨，主力资金净流入1.85亿元

Group 1 - The packaging and printing sector increased by 1.12% compared to the previous trading day, with Baixinglong leading the gains [1] - The Shanghai Composite Index closed at 3876.37, up 0.16%, while the Shenzhen Component Index closed at 13053.98, down 1.29% [1] Group 2 - The net inflow of main funds into the packaging and printing sector was 185 million yuan, while retail funds saw a net inflow of 9.32658 million yuan [2] - The sector experienced a net outflow of 278 million yuan from speculative funds [2]