Group 1 - A-shares experienced significant market activity with 57 stocks hitting the daily limit up and 11 stocks hitting the limit down [1] - PTA concept stocks were notably active, with Sanfangxiang reaching the limit up [1] - The non-ferrous aluminum sector strengthened, with Minfa Aluminum achieving two limit ups in three days, and China Aluminum and Nanshan Aluminum also hitting the limit up [1] - Phosphate chemical stocks saw an increase, with Batian Co. and Chengxing Co. reaching the limit up [1] Group 2 - ST Zhongdi (rights protection) achieved a remarkable 15 consecutive limit ups, while *ST Baoying had 10 limit ups in 11 days [1] - Other notable stocks include *ST Zhongdi, ST Xuefa with five consecutive limit ups, and Zhenhua Co. with four limit ups in seven days [1] - On the downside, *ST Yuancheng (rights protection) faced 19 consecutive limit downs, with *ST Wanfa and *ST Yatai experiencing two consecutive limit downs [1]