午间涨跌停股分析：63只涨停股、10只跌停股，小金属板块走强，云南锗业2连板

Group 1 - A-shares experienced significant activity with 63 stocks hitting the daily limit up and 10 stocks hitting the limit down on August 20 [1] - The liquid metal concept saw strong performance, with Dongfang Zirconium hitting the limit up [1] - The small metal sector also showed strength, with Yunnan Zinc Industry achieving two consecutive limit up days [1] Group 2 - ST Gaohong faced a continuous decline with eight consecutive limit down days [2] - Aili Home and ST Nanzhi both experienced two consecutive limit down days [2] - ST Huarong and Xintian Pharmaceutical also hit the limit down [2]