If you are a college student in an English college or a student with good English in a famous university, the average 50 yuan/hour.

If I graduate soon, I will work in English, 80~ 100

If you are a middle school English teacher, 120~ 150.

If you are teaching TOEFL IELTS BEC or something, 200

Or see what he wants to learn.

Basic 50

Middle 100

Advanced ... usually not.

Oral sparring or something.