Turnoi, I think it's like this. You are lecturing at a 'real' university as opposed to many of China's universities and colleges, that are 'pretend' ones, universities and colleges in name, but not in function. That's why foreigners teaching there are called foreign teachers or foreign experts rather than lecturers or professors.

So,comparing like with like is impossible as they couldn't be more different!

One tier below further education is secondary education. Foreign teachers in China are generally teaching between 18 and 22 periods a week in junior middle schools or senior middle schools. For junior middle school teaching, one's English level is much less important than one's ability to entertain one's students by making a fool of oneself and/or by cracking childish jokes in front of one's captive audiences, one's pupils, who should be captivated by your lessons. For senior middle school teaching, the situation is little different, except that one will be in trouble if one's spoken English is grammatically incorrect too often and/or one's blackboard work has too many spelling mistakes, either of which will be noted by the odd clever pupil or the occasional Chinese teacher of English who observes one's lessons from time to time.
Many foreign teachers working in China would be in trouble back in their homelands teaching English at high schools there, not only because of their dodgy English, but also because disciplinary problems would enter into the equation. Also, they'd be busy marking written homework in the evenings and teaching around 27 lessons a week, different lessons to be prepared for different grades. So, many university graduates in the West do not choose to train as high school teachers there, realizing such jobs are underpaid for the hours worked and the stress involved.

Foreign teachers at Chinese kindergartens and primary schools needn't have good English. But the ability to entertain and to befriend their pupils is a must!

Most foreign teachers in China are paid at least double that of Chinese teachers of English. And the latter do make enough money by teaching to live quite well. So I reckon FT's in China are not at all poorly paid for the work they actually do.Quite the opposite, in fact.

Generally, EFL teachers in China needn't be of high quality to function adequately at their workplaces in this country.

My last observation is that many jobseekers submit resumes to Chinese employers portraying themselves as good at teaching EFL to students of all ages - what a lie!

As is commonly said, jack of all trades, but master of none! EFL in China is vastly different to that in Europe.