环保设备板块12月23日涨1.85%，美埃科技领涨，主力资金净流入2.39亿元

Group 1 - The environmental equipment sector increased by 1.85% compared to the previous trading day, with Meiyu Technology leading the gains [1] - The Shanghai Composite Index closed at 3919.98, up 0.07%, while the Shenzhen Component Index closed at 13368.99, up 0.27% [1] - A table detailing the individual stock performance within the environmental equipment sector was provided [1] Group 2 - The net inflow of main funds into the environmental equipment sector was 239 million yuan, while retail funds experienced a net outflow of 77.74 million yuan [2] - The net outflow of speculative funds was 162 million yuan [2] - A table showing the fund flow for individual stocks in the environmental equipment sector was included [2]