Take 7-year-old who didn't repeat the grade in the middle of primary school as an example:

Primary school (6 years) 7 years old-13 years old

Junior high school (3 years) 13 years old-16 years old.

Senior high school (three years) 16- 19 years old.

University (4-year program) 19 -23 years old

I'm a little early. 2/kloc-graduated from university at the age of 0 and master's degree at the age of 24. Most of them graduated at the age of 22 and graduated with a master's degree at the age of 25.