亿晶光电：主要通过德国子公司在欧盟地区开展销售业务

Group 1 - The core viewpoint of the article is that Yijing Optoelectronics (600537) is primarily conducting sales operations in the European Union through its subsidiary in Germany, while also providing business support based on customer needs through its international sales team [1] Group 2 - The company emphasizes its strategic approach to international sales by leveraging its subsidiary in Germany to enhance its market presence in the EU [1] - The international sales team is responsive to customer demands, indicating a customer-centric approach in its business operations [1]