Group 1 - The core viewpoint of the article is that Yunyi Electric (300304) has developed nitrogen-oxygen sensor products that can be applied to hydrogen fuel engine vehicles, specifically for the SCR system requirements in the context of lean gas combustion [1] Group 2 - The company responded to investor inquiries on its interactive platform, highlighting the compatibility of its products with hydrogen fuel technology [1] - The focus on hydrogen fuel engines indicates a strategic alignment with emerging automotive technologies aimed at reducing emissions [1] - The application of nitrogen-oxygen sensors in SCR systems suggests potential growth opportunities in the green technology sector [1]