Well, I'm just one expat that has spent quite a long time in both the Middle and Far East, (not China), as an expat and we certainly didn't get any preference for the routes we flew, got exactly the same time off as the locals and our salaries were geared up with some allowances to allow for the fact that we were not living in our home country with the benefits that incurs. The basic salary and increments as well as the meal allowances and any additional flying pay was identical to the locals, the extra allowances would be towards housing and education of children. The local pilots have security of tenure and often a better pension scheme than is offered to contract expat pilots.
This 'letter' sounds like a deliberate
stir, unsupported by any facts or objectivity.