午间涨跌停股分析：56只涨停股、20只跌停股，乳业板块活跃，均瑶健康、阳光乳业等涨停

Group 1 - A-shares experienced significant market activity with 56 stocks hitting the daily limit up and 20 stocks hitting the limit down [1] - The dairy and milk powder sector showed strong performance, with companies like Junyao Health and Sunshine Dairy reaching the limit up [1] - Aerospace-related stocks gained momentum, highlighted by Aerospace Mechatronics achieving 7 consecutive limit ups over 12 days, along with Aerospace Electronics and Aerospace Information also hitting the limit up [1] Group 2 - The commercial retail sector saw an increase, with Baida Group achieving 3 consecutive limit ups and Guangbai Shares hitting the limit up [1] - Notable stocks with consecutive limit ups include *ST Chengchang with 6 limit ups over 7 days, and Furi Shares with 3 limit ups over 7 days [1] - Conversely, several stocks faced consecutive limit downs, including *ST Zhengping with 9 consecutive limit downs and *ST Fanli with 8 consecutive limit downs [1]