午间涨跌停股分析：73只涨停股、5只跌停股，PCB概念活跃，东山精密5天3板，景旺电子2连板

Group 1 - A-shares experienced significant activity with 73 stocks hitting the daily limit up and 5 stocks hitting the limit down on September 11 [1] - The PCB concept stocks were particularly active, with Dongshan Precision achieving 3 limit ups in 5 days, and Jingwang Electronics achieving 2 consecutive limit ups [1] - CPO concept stocks also showed strength, with Cambridge Technology hitting the limit up [1] - AMD-related stocks saw an increase, with Haiguang Information hitting the limit up [1] Group 2 - *ST Weier achieved 10 limit ups in 13 days, while Shoukai Co. had 7 consecutive limit ups [1] - Qingshan Paper had 5 limit ups in 8 days, and *ST Yatai achieved 4 consecutive limit ups [1] - *ST Hongkong had 3 limit ups in 5 days, with other stocks like Chunzong Technology and Suning Universal also showing multiple limit ups [1] - On the downside, *ST Gaohong faced 24 consecutive limit downs, along with *ST Huiteng and Youzu Network also hitting the limit down [2]