Basing on an allsides investigation of primary, intermediate and advanced Korean students, the paper tries to observe the real difficulties in Chinese phonetics from development, not only from the view of comparision between Korean and Chinese. Furthermore, the difficult point of Chinese pronunciation are classfied to different comparative difficulty levels and development difficulty levels according to the result of investigation. Otherwise, it was also discovered that in nature speech the relative influence between innials and finals, the innials or finals’ position in a syllabus, spelling rules all have some infection to correctness of students’ identification and pronunciation
There are abundant You-Yin(又音) in Guang Yun. One kind we call it special You-Yin(又音), which has two phonetic notations, one hides in another word’s paraphrase by Zhi-Yin(直音), the other pronunciation shows by Fan-Qie(反切). The Chinese character which has this two kinds of phonetic notations we name it Yun-Zi-A(字A). The word which Yun-Zi-A(字A) hide in we name it Zheng-Yun-Zi (正字). The two phonetic notations are same in flection formally, so we say that Yun-Zi-A(字A) are all untrue You-Yin(又音) in the form. But if we link Yun-Zi-A(字A) with its Zheng-Yun-Zi (正字), we will find that there are two different situations in fact. Some Yun-Zi-A(字A) has true You-Yin(又音), the other has untrue You-Yin(又音).