Well, how about this strategy?

Accept a post that pays flight reimbursement. Then purchase a return air ticket, business
class, to your homeland. Present the ticket to the employer. Accept reimbursement, maybe
16,000 RMB or more. The more expensive the ticket the better. Later cancel the ticket
and get money back. Perhaps you should take out flight insurance that covers you for
such cancellations in advance, or book with an airline that has low penalties for
cancellations, verging on 10-20 % for such cancellations. Remain in China and move on.

I know it's dishonest, but I think it's doable! You can make more money this way than by
accepting a flight allowance

Hey there, fleecer. I think you meant economy class. I'll forgive you for that error as I think your suggestion has potential!