Russia provided China with full digital blueprints, machine tools and process documents for their AL-31 engine.
It’s a reliable workhorse with great performance. Often exceeding 1,000 hrs of service before overhaul. Its MTBF is about 500hrs.
The Chinese version (WS-10) has been in development from those plans, and even engineering assistance on the ground, for nearly 10 years.
And it’s has to be overhauled every 10 hours and performs like a pig.
The Chinese systems are more akin to cartoon version of what they stole or were given/sold by others.
US military planners assume the worst, but they no there is no contest should the shooting start.
So do the Chinese.
Er, the Chinese solved the problem with the WS-10 several years back.
China & Russia together will surpass US military & economic power, if they haven’t already. It’s inevitable. We are going to have to have with them.