“Conquering the Guitar Sea” is a book that starts with the most basic music theory, not the most basic guitar skills. It has a broader scope. While teaching guitar, it also teaches the most serious music theory. It is suggested that we should buy a book that emphasizes the explanatory skills and practice folk songs together: Ji, Shanghai Music Publishing House. He is a complete course. The original textbook of Hal-Leonard Company of America was introduced and translated into Chinese version for distribution. 48RMB Classical Direction: Carl Casey Classical Guitar Course. Publishing House is not available. Classic textbooks.