午间涨跌停股分析：67只涨停股、8只跌停股，半导体板块活跃，长川科技、立昂微2连板

Group 1 - A-shares experienced significant activity with 67 stocks hitting the daily limit up and 8 stocks hitting the limit down on September 24 [1] - The semiconductor sector showed strong performance, with stocks like Changchuan Technology and Lianang Micro achieving consecutive limit ups [1] - The electronic chemicals sector also performed well, highlighted by the limit up of Grinda [1] Group 2 - Notable consecutive limit up stocks include *ST Yatai with 12 limit ups in 13 days and *ST Huawang with 4 limit ups in 6 days [1] - Other stocks with consecutive limit ups include Huasoft Technology with 4 consecutive limit ups and Dalong Real Estate with 3 limit ups in 4 days [1] - Conversely, *ST Gaohong faced a continuous decline with 9 consecutive limit downs, along with ST Zhongdi and *ST Wanfang experiencing 2 consecutive limit downs [1]