岩山科技今日跌停，有2家机构专用席位净卖出7421.50万元

Group 1 - The stock of Yanshan Technology experienced a limit down, with a trading volume of 11.251 billion yuan and a turnover rate of 24.25% [1] - After-hours trading data shows that the Shenzhen Stock Connect special seat bought 180 million yuan and sold 717 million yuan, indicating significant trading activity [1] - Two institutional special seats had a net sell of 74.215 million yuan, reflecting a bearish sentiment among institutional investors [1]