And it is probably advisable that you accept a position that pays you flight allowance rather than flight reimbursement.

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.