After-hours data shows that on March 11, a total of 35 stocks appeared on the trading leaderboard with institutional presence, with 18 stocks showing net purchases by institutions and 17 stocks showing net sales. The top three stocks with the highest net purchases by institutions that day were Yunding Tech, Haiyou New Materials, and Yanshan Technology, with net purchase amounts of 195 million yuan, 195 million yuan, and 156 million yuan, respectively. The top three stocks with the highest net sales by institutions that day were Xinquan Co., Ltd., Chaojie Co., Ltd., and Yongjie New Materials, with net outflow amounts of 210 million yuan, 184 million yuan, and 79.68 million yuan, respectively. (First Financial)