1. Different compilation time: Tongyun was compiled in the early Tang Dynasty by Li Ling and Du Ling, while Xinyun was compiled in the middle of Song Dynasty by Ouyang Xiu and others.
2. The radical division is different: the homophonic radical division is more detailed, while the new rhyme radical division is relatively simplified.
3. The division of rhyme is different: the division of rhyme is broader, and that of new rhyme is more detailed.
4. Different application scope: Tongyun is mainly used in ancient poetry creation, and Xinyun is mainly used in modern poetry creation.
5. Different specifications for word selection: Tongyun selects only one representative word for words with the same rhyme, and Xinyun selects multiple representative words for words with the same rhyme.