Analog of Hong Kong grade level for Chinese characters? The Unihan database lists a kGradeLevel for each entry. This is the primary grade in the Hong Kong school system by which a student is expected to know the corresponding character.

Is there a similar categorization of characters into grade levels that applies to all of China (PRC)?
Of course we have, you can see it on baidu.com.

But because in China many provinces now have the right to have their own teaching syllabus, they may have different categorization of characters. But all the characters must come from the most common used 2500 characters. Then spread to the  other characters.