Self-built after the generation behind is to learn computer programming skills and become excellent through self-study or taking back-network learning courses. "Self-built after the generation behind" refers to learning computer programming technology through self-study or taking a learning course with back network, becoming an excellent programmer and finally realizing his technical dream. This slogan is mainly used to encourage and motivate people who want to be programmers, master programming skills and knowledge through their own efforts and the support of the backing network, become an excellent programmer, and realize their career and life goals.