Whatever, the CMF course is going to be an end. "C", "M", "F" separately stand for "color", "material", and "furnishing". Generally speaking, the course is just like the other courses taught by Mother Yang, but the teacher Liu Jiachang, who comes from Taiwan, is a great and kind person (which may origin from his bumpy life experience). He is really a humorous man you know. That's one of the reasons I draw the illustrations.