Primary school 20/ hour, junior high school 25/ hour and senior high school 30/ hour, but usually junior high school 25/ hour and senior high school 35/ hour.
I know better, because once I waited for my parents to pick me up at the gate of the bookstore, hehe. Yes, the surrounding college students generally pay this price, and some bid higher. The tutor of one of my classmates is 25/ hour (fourth grade).