Linked from
The 14 pages that link to Middle Chinese, each with the reason it gives.
Old ChineseBroader topic: It is a later stage whose contrasts can be traced back toward Old Chinese.
Wu ChineseRelated: Its categories provide a reference point for comparing modern Wu sound patterns.
Min ChineseRelated: Min sound correspondences are compared with this documented historical stage.
Xiang ChineseRelated: Comparisons with Middle Chinese help trace sound developments in Xiang.