(Mr. Li Yindong has been engaged in software development and IT teaching for many years. Proficient in Java technology system, especially in-depth understanding of Android technology system. He has successively served in Yingji, Hitachi (China), Caijing and other Internet enterprises. Be good at arrangement, management and implementation, and have some insight into the sophisticated and compliant process work mode. He once led the development team to implement a sensitive development process, and was good at finding and solving problems in the implementation process. Participated in the development of enterprise internal office management system, warehouse purchase, sales and inventory management system, and Internet use under the Android platform. The teaching is humorous, rigorous and responsible. He likes to teach with the method of teaching fish, attaches importance to students' practical ability, and has a common guiding method for students' logical thinking. This document includes the following annexes:)