"A language training center provides a higher potential of learning the language than the Chinese public sector does."

What all establishments, every training centre? I cannot believe that. And isn't 'potential' related to the end result - often getting an easy entrance into another country? You've said this yourself about GAC.

Many universities also do placement testing, and interactivity is down to the individual teacher's style rather than any prescribed approach. There are medicore universities and public schools as well as training centres. In a mixed education economy this is only to be expected and does not just apply to China.

"Most importantly, a language training center's academic material for the language taught is uncomparably easier to come, and come in an actual foreing language, in a training center than in many public sector schools on mainland, where academic supervisors and teachers face varieties of restrictions."

I can't see how you come to this generalised conclusion. Reading many of the posts here, many teachers have commented on the paucity of decent materials in training centres or being expected to teach from woefully inadequate and in-house prepared materials. You yourself have commented on the inadequate management and types of teaching materials that are in use in the training centres where you have only worked.

I think you'll find the description, possibly coined by Turnoi, was "white monkeys in a muppet show" but they may dance as well!

We all know there are systemic failures in China's education system but reminding us of them does nothing to solve the problem. You tried to establish your own training centre and failed, so we can understand your bitterness about not getting a slice of the pie.