(A complete set of video + development board package for embedded Linux core courses, * completely zero foundation, reducing the learning threshold.*The language is easy to understand, easy to understand. I'm not afraid to learn, but I'm afraid I can't.*Clear thinking, funny language, can't sleep watching videos*Video + documentation + Exercises + Q & A to improve learning quality.*Basic knowledge + mind mapping teaching method, teach them to fish, teach them to fish.*Series of courses. Focus on long-term growth rather than single point knowledge learning.)