云意电气：公司在氮氧传感器业务基础上，正积极向颗粒物传感器、氧传感器两大品类延伸

Core Viewpoint - The company, Yunyi Electric, is expanding its sensor product matrix by actively developing particulate matter sensors and oxygen sensors based on its existing nitrogen oxide sensor business [1]. Group 1: Business Development - The company has completed the research and development of particulate matter sensors and is gradually entering the aftermarket [1]. - The company is simultaneously engaging with domestic OEMs to advance the adaptation testing in the original equipment manufacturing sector [1]. - The company aims to leverage its existing technological accumulation and customer resources to seize opportunities in both domestic and international markets amidst the wave of import substitution [1].