Did you earn the RMB legally? (Work permit & paid taxes?). If yes then it’s easy. Go to tax office & get copies of your income tax receipts/payments. Take those to bank with passport & bank card. You can exchange as much as you can show tax receipts for AND wire it home at the same time.

I’d recommend leaving correctly. Give your employer at least the minimum 30 days notice as required by law, longer if you feel like it. That they they’ll probably help you apply for the humanitarian visa or if you’re resident permit has a bit of time left they’ll let it run out. If you think you might come back to work in the foreseable future then also get your release letter & recipt to show your work permit was cancelled.

Leaving with no notice just gives employers bad views about foreigners

Ok, so can I post something that was reported in a Chinese newspaper? (English translation, not original link)

“Sept. 26 report by the Urumqi Evening News that sales of train tickets will be suspended indefinitely from Oct. 22.

"The Xinjiang railway administrative departments will stop selling tickets on all passenger services leaving Xinjiang, and also for intraregional services, from Oct. 22, 2018," the newspaper reported.

"A separate announcement will be made regarding when ticket sales will be resumed," it said.”

There are rumors that ticket sales have been stopped in XJ for the near future to allow transportation of uneducated undesirables...

@ Janjal, Shanghai has allowed transfers from other visas (including L) to work petmits/resident permits in country for a couple of years now. I’d also read recently that Guangzhou & Beijing were starting to follow SH.