中航沈飞：公司与中航西飞同属于中国航空工业集团下属企业

Group 1 - The core viewpoint of the article is that AVIC Shenyang Aircraft Corporation (中航沈飞) is part of the China Aviation Industry Corporation and has clarified its relationship with AVIC Xi'an Aircraft Industry Group (中航西飞) [1] - AVIC Xi'an primarily engages in the research, manufacturing, sales, maintenance, and service of military large and medium-sized aircraft and civil aviation components [1] - The main business of AVIC Shenyang focuses on the manufacturing of aviation products, with key products including defense equipment and civil aviation products, highlighting its core competency in aviation defense equipment [1]