长光华芯：200G EML已开始送样，阶段性验证进展顺利

Group 1 - The core point of the article is that Changguang Huaxin (688048.SH) has begun sampling its 200G EML, and the progress of phase verification is going smoothly [1] Group 2 - The company is actively engaging with investors through its interactive platform, indicating transparency and communication regarding its technological advancements [1] - The successful progress in the verification phase suggests potential for future product development and market readiness [1]