A股PCB概念股集体下挫，大族数控跌9%，合力泰跌超8%，埃科光电、崇达技术跌7%，光华科技、智信精密、宏和科技、中一科技跌6%

Group 1 - The A-share market saw a collective decline in PCB concept stocks, with notable drops including Dazhu CNC down 9%, Helitai down over 8%, and Aikou Optoelectronics and Chongda Technology down over 7% [1][2] - Specific stock performances included Dazhu CNC with a market cap of 44.3 billion and a year-to-date increase of 190.60%, while Helitai had a market cap of 24.9 billion and a year-to-date increase of 39.33% [2] - Other companies such as Huaguan Technology, Zhixin Precision, and Honghe Technology experienced declines of over 6%, with market caps ranging from 25.84 billion to 331 billion [2]