1. Business scope: China Airlines mainly provides aviation information technology and solutions, covering aviation information, aviation safety, aviation logistics and other fields, while China Telecom only provides integrated communication services, including mobile communication, fixed-line communication, Internet access, cloud computing and big data.
2. Nature of the company: CATIC is a subsidiary of aviation industry corporation of china and one of the largest providers of aviation information technology and solutions in China, while China Telecom is a state-owned communication service provider, providing mobile communication, fixed-line communication and information services.