午间涨跌停股分析：52只涨停股、11只跌停股，电网设备板块走强，泰永长征4天2板

Group 1 - A-shares saw 52 stocks hitting the daily limit up and 11 stocks hitting the limit down during the first half of the trading day on December 12 [1] - The CPO concept was active, with Lian Te Technology hitting the limit up [1] - The power grid equipment sector strengthened, with Taiyong Changzheng achieving two limit ups in four days, and companies like Zhongli Group and Hualing Cable also experiencing consecutive limit ups [1] Group 2 - The controllable nuclear fusion concept rose, with Xue Ren Group achieving two consecutive limit ups, and companies like Guoji Heavy Equipment and Sichuang Electronics also hitting the limit up [1] - Among the stocks with consecutive limit ups, Zhongyuan Home achieved five limit ups in seven days, while *ST Chengchang had five limit ups in six days [1] - Several stocks faced consecutive limit downs, including *ST Zhengping with eight consecutive limit downs and *ST Fanli with seven consecutive limit downs [1]