For the Chinese government to hope to stifle the cultural context, so that Western ideas are shackled in the classroom would be counter-productive...

...and self-contradictory.

They need and want Foreign (Western) teachers to fill the classroom so that they may charge profitable fees, but they do not want any 'contagion' of ideas, values, or behaviours.

The mere existence and presence of the teacher standing before the students will bring those ideas into contact with Chinese students.

They want to return to 1977.

Idiomatically, they want to have their cake and eat it, too.