UMIST and U of Manchester combined part of their management shools.
So the shool is actually very strong and enjoys the reputation of U of M!
Some programmes need GMAT, some not.
Should be in the top 5 B-shool of UK.
UMIST is University of Manchest Institution of Science and Technology. It is about 5 or 6 in the management ranking. I will say it is a much better if you do management course here.
UMIST is a good uni in management. If your first degree is from a recognised univericity in China, I don't think you need to provid anything else apart from IELTS at 7, provided that your frist degree is management related area.