It's obvious you're a newbie on the board.Turnoi is no typo.He's the poster who convinced me not to desert the board after I had initially got personal abuse from the sharks on here.So I changed my pseudonym to one similar to his as a sign of my thanks to him for his encouragement.
Thanks for expanding on 'hours worked' at EF Changchun.The situation re teaching hours or teaching periods is just as I had expected.In fact,20 clock hours or hours of teaching equates to 26 or 27 teaching hours at 45 minutes/teaching hour.In the past,a wily prospective Chinese employer tried to con me with that.The extra 6 or 7 lessons/week makes one hell of a difference to one's workload in my view.Personally,I'd reject any teaching post in China involving more than 22 teaching periods/week,and I wouldn't accept a post that required me to make up missed classes due to public/school holidays either.What's more,I'd never look for a job on the side.One job is enough for me!
Generally speaking,for a variety of reasons it's better to work direct for Chinese schools or colleges within the public sector than for agents or private sector employers.