Not normal. In China, both boys and girls enter the first grade at the age of 6, and they graduate from high school at the age of 18. At the age of 20, I will be a sophomore, and at the age of 24, I am too old, so it is not normal for a boy to be a sophomore at the age of 24. From the age of 6 to the first grade, I have been in primary school for six years, junior high school for three years, and graduated from high school for twelve years 18 years old. In the same year, I took the college entrance examination. I was a freshman 19 years old, a sophomore at 20 years old, a junior college graduate at 2/kloc-0 years old, and an undergraduate at 22 years old.