Do I need to get a visa to enter China if I'm flying to Urumqi to have a treatment?

Hello my name is Bahrom Ahmedov!
I'm a citizen of uzbekistan, live in Namangan.
I have contacted with Dr.Zhao Xingian municipal hospital Urumqi about my gamma knife treatment.
Everything is sttled down and I was waiting for a avia ticket but now peope say that I need to have visa for china. Is it true?