Private training centres follow quite a different system; it is incompatible with the system of the public sector for a number of principal reasons. One of them is that they hire less qualified teachers than you would find in the public sector, and in saying so I am talking about common standards in the West, not in China!

And let me add that the reason they are generally forced to hire less qualified teachers is that most better qualified teachers take jobs working for employers in China who are more reputable in comparison,and so do not offer their services to Mickey Mouse outfits out to make a fast buck by means of exploiting gullible Chinese with more available income than common sense while at the same time burning out their foreign staffs.
Long may this situation continue - greedy,dishonest employers are deserving of less qualified teachers.Actually, the former deserve performing white monkeys, and that's mostly what they get!