崇达技术：公司通过持续优化产品结构，使高端PCB产品收入占比超60%

Group 1 - The core viewpoint of the article highlights that Chongda Technology (002815) has optimized its product structure, resulting in over 60% of its revenue coming from high-end PCB products [1] - The company is actively engaged in the research and development of cutting-edge technologies such as 112G communications to enhance its gross margin [1] - The company's products are primarily exported to regions including the Americas, Europe, Japan, and Asia-Pacific [1] Group 2 - In the 6G field, the company has products that are currently in the sample stage [1] - However, the company has not yet ventured into areas such as quantum technology, brain-machine interfaces, and biomanufacturing [1]