Why didn't China set up a Chinese proficiency test?

Because there are so many Chinese characters in China, not everyone has Chinese characters, and they have a strong interest in Chinese characters, so they are all in their minds. Therefore, only the Putonghua proficiency test has been set up in China. There is no language proficiency test. Moreover, there are many kinds of languages, including writing and understanding, as well as some poems, ancient poems and classical Chinese. If you want to take a Chinese exam, it is equivalent to taking many grade exams.