It is almost impossible for New Zealand to get the immigration score of 140 without job opportunities, and the approval rate of 100 to 139 is only 8%, so it is almost impossible.
Australia needs you to make a career assessment, and you need to rely on IELTS and work experience as supporting materials. Moreover, Australia uses the EOI system to screen and draw lots, so it is a little more difficult to be a popular country.
The best choice now is Canada. The minimum score of IELTS in Canada is four sixes. You don't need a career evaluation. Just send the diploma to Tsinghua for academic certification. Moreover, it is not a lottery system. It will be arranged when it is sent and received.