1, the textbook must be a complete system, that is, a complete set from the elementary to the intermediate level of 0 foundation. For example, 1-4 volumes of new Japanese, 4 volumes of standard day for junior and middle school students and so on. Advanced boot can be another system. For example, standard days can be used for beginners and intermediate students, advanced Japanese can be used for Wukan and Kimura, and advanced Japanese can also be used for 5-8.

2. The textbook should be equipped with a better tape or MP3, and it is best to record the texts read by the Japanese. The author suffered a loss here. For example, 1-4 volumes of newly edited Japanese recordings have been downloaded everywhere on the Internet, but the author is not satisfied. Dissatisfaction mainly refers to the male voice (from China) who read the text, and the female voice in Book 4 (the female voice has been changed three times in Book 4) is more satisfied.