(The main contents of this video: 1. The demand and salary of network engineer in the society at that time. 2. At that time, there was a lack of network engineer teaching in the school. 3. Share the course design methods and learning methods of network engineer first. 4. Introduce the technology that an excellent network engineer should grasp. 5. Introduce a perfect network engineer vocational teaching system. 6. Give gifts to provide network management technology learning materials)