China does not need help for motor sich on turboshaft. WZ-9G and WZ-10 are all doing great. They are better than their Russian counterpart of similar weight class. They should also be getting WZ-16 in the future. This is all they need for their major helicopter projects.
The big question for me is what is being used on L-15 right now. If they got just the 200 AI-222 from several years ago, they should be running out on it. Is L-15 using a domestic option right now? I really don't know.
There are areas where they can probably get Russian help on. Reactor for nuclear submarine is an obvious one. But the list is not as long as people think.
As I said, China has made a lot of progress in the past 10 years. Its indigenous options are not necessarily worse than Russian ones.