this is an emergency. in most states, he is qualified fr medical

you need to talk to the hospital. they should have a specialist in charge of it. even if there's no resource from govt, there're charities.
dont send him back to china. why torture your old sick father with the long flight? it only takes 2-4 months to get 485 approval (family based) these days, provided the case is approvable. did you get the transfer to CSC notice yet?