I have no idea where this notion of bad after sales support for Chinese products comes from.

I have never heard of the Pakistanis, Egyptians, Sri Lankans or anyone else how has bought Chinese weapons complain about poor after sales support.

On the contrary, it is often the Russians that are blamed for having bad after sales support.

K-8 sales seems to be doing ok 😀

What was Guizhou thinking sending FTC-2000 against the Yak-130, and T-50 for LIFT. The only thing it can
win on is on price. Although the PLAAF thought it good enough for lead-in training for its own pilots …..