In my opinion, you should also take into account how many lesson plans will be needed per week, > 2 not good, and the length of each teaching hour, and the cost of living in the area you will be teaching in, as well as time spent commuting to work, The 'office hours' part is no so good, and I wonder whether it'a a training center or a private school, not good either. If the job's in Shanghai or in Guangzhou city, the salary is on the low side compared to the high cost of living there. Also beware of having to teach evenings and/or weekends regularly, that's bad as the hours are unsocial. Tread with caution!