I did try to help out that useless teacher at my former uni, but I was teaching 26 classes a week there.....

Most Chinese unis schedule an FT to teach somewhere between 14 and 18 classes/week. I wonder why your uni lumbered you with such a heavy workload. Is this a new trend in China, to save money by hiring fewer FT's and keeping them busier? Hell's bells, I hope the state education sector isn't succumbing to capitalisic tendencies! I came to China to get away from that kind of crap.