福晶科技(002222.SZ)：核心产品聚焦晶体元器件、精密光学元件和激光器件三大类

Group 1 - The company focuses on three core product categories: crystal components, precision optical components, and laser devices [1] - These products are primarily applied in the fields of lasers and optical communications [1] - The company continues to pay attention to industrial development opportunities in related fields [1]