YOU SAID:

china is great and better than Japan (I think this is Japanese)

INTO JAPANESE

中国は日本よりも素晴らしく、優れています（これは日本語だと思います）

BACK INTO ENGLISH

China is better and better than Japan (I think this is Japanese)

INTO JAPANESE

中国は日本よりも優れています（これは日本人だと思います）

BACK INTO ENGLISH

China is better than Japan (I think this is Japanese)

INTO JAPANESE

中国は日本より優れている（これは日本だと思う）

BACK INTO ENGLISH

China is better than Japan (I think this is Japan)

INTO JAPANESE

中国は日本より優れている（これは日本だと思う）

BACK INTO ENGLISH

China is better than Japan (I think this is Japan)