航天彩虹：公司专注于高科技膜领域，重点发展功能聚酯薄膜和光学膜两大业务

Core Viewpoint - The company focuses on high-tech film sectors, emphasizing innovation in process technology and new product development [1] Group 1: Business Focus - The company is dedicated to the development of functional polyester films and optical films as its two main business areas [1] - The company employs a comprehensive control model encompassing "R&D + procurement + production + sales" to accurately meet market demands [1]