How many characters do Chinese pupils know at different ages?
Children usually go to grade 1 at the age of 6 or 7 in China.

According to "全日制义务教育语文课程标准", the character number that children should learn is:

Grade 1 to Grade 2: can read 1600 characters, and write 800 characters;

Grade 3 to Grade 4: can read 2500 characters, and write 2000 characters;

Grade 5 to Grade 6: can read 3000 characters, and write 2500 characters;

Grade 7 to Grade 9: can read 3500 characters, and write 3000 characters.