A股PCB概念股延续强势，景旺电子2连板

Group 1 - The core viewpoint of the article highlights the strong performance of A-share PCB concept stocks, with significant gains observed in several companies [1] Group 2 - Jingwang Electronics has achieved a consecutive two-day limit-up in stock price [1] - Dongcai Technology, Dingtai High-Tech, Dongshan Precision, Honghe Technology, and Shenghong Technology have all seen stock price increases exceeding 5% [1]