午间涨跌停股分析：56只涨停股、5只跌停股，跨境电商概念活跃，供销大集、飞马国际等涨停

Group 1 - A-shares saw significant market activity with 56 stocks hitting the daily limit up and 5 stocks hitting the limit down on September 16 [1] - The cross-border e-commerce sector was notably active, with companies like Gongxiao Daji and Feima International reaching the limit up [1] - The automotive thermal management concept gained strength, exemplified by Yinheng Co., which also hit the limit up [1] Group 2 - Continuous limit down stocks included *ST Gaohong and *ST Zhongji, both experiencing three consecutive days of limit down [2] - *ST Dongtong and *ST Lvkang faced two consecutive days of limit down, while ST Zhongdi also hit the limit down [2]