午间涨跌停股分析：45只涨停股、1只跌停股，PEEK材料概念走强，中欣氟材、新瀚新材涨停

Group 1 - A-shares saw a total of 45 stocks hitting the daily limit up and 1 stock hitting the limit down during the first half of the trading day on August 5 [1] - The concept of composite flow batteries was active, with Yuanchen Technology hitting the limit up [1] - The PEEK materials sector strengthened, with Zhongxin Fluorine Materials and Xinhan New Materials both hitting the limit up [1] Group 2 - ST Yazhen achieved a five-day consecutive limit up [1] - Zhongma Transmission recorded four limit ups in five days [1] - Other notable stocks include Beijia Clean, Wenke Co., and Changcheng Military Industry with multiple consecutive limit ups [1] Group 3 - Qizheng Tibetan Medicine experienced a limit down [2]