There are many collected phonetics which came from The Annotation of Classics in Jiyun. In The Annotation of Classics, the nature of Yinqie (音切) is very complex. There are some Yinqie not labeling phonetics for the prefixes. In Yinqie not labeling phonetics for the prefixes, some noted phonetics for variant, some noted phonetics for synonym, some noted phonetics for approximate character in form, some noted phonetics for notes and commentaries, some noted phonetics for original character. Of course, there are some Fanqie (反切) which noted phonetics for synonym in Jiyun. In the paper, we have specially discussed the Fanqie (反切) which noted phonetics for synonym in Jiyun. We divided the collected phonetics into two categories. We gave some examples for every category.