Better overall project & procurement management and control. For example, the US NGAD programme had 3 contenders to build and contest (fly off) for being the the next NGAD. This already has an implied a 2/3 "waste" inbuilt into the programme. I believe the chinese does a lot more technical evaluations to decide upon the appointed winner to build the eventual prototype for first flight and evaluation and enhancement (vs flyaway contest).Thank youI wonder how China is able to afford all these programs its insane
Then there is the overall success of the project itself, ie how many of these projects get to be put into service. From impression, the chinese appear to have less programmes being cancelled due to budget constraints, save for the 1980s 90s when the programme was obsolete and the overall focus was on the economy.
Then there is the overall commonality of research, technologies, systems, materials, etc. Eg sensors, stealth materials, etc.
Finally, most of chinese aerospace companies are state owned, and are less concerned over pandering to the stock owners for high margins and capital appreciation in the stock exchanges per se.