The following is an excerpt from the EF Xi'an English Teacher contract. They tried to scam me. Read on.
The EF Xi'an contract is deliberately complicated so that teachers can be asked to teach ridiculous hours. Essentially (and this was confirmed with the school) I could have been asked to teach up to 43.5 hours a week. This is due to them counting 1 hour of teaching time as 40 minutes of 'real' time. Therefore 29 'real' hours a week during peak season = 43.5 'teaching' hours a week. Office hours are in addition to these teaching hours. I didn't take the job, but see it for yourself. Work there at your own risk.
2:0 Working Hours: (1)The Second Party will be required to work up to 40 real hours per week, of which, 24 to 29 real hours will be contact teaching hours, depending on the season. During the peak season (June through August or January through February), the Second Party will be required to teach from 24 to 29(inclusive) real contact hours per week, or 104-126 real contact hours per calendar month. Outwith the high season, the Second Party will be required to teach up to 24 real hours per week or 104 real hours per calendar month as contact/teaching hours. (2)Classes are calculated in academic hours. One academic hour equals 40 real minutes. One month equals 4.33 weeks. (One year (12 months) has 52 weeks.) (3)As part of the contact hours the Second Party is required to teach, occasional substitution may be required to cover unscheduled absences of other teachers.