How China Build Its Cutting Edge Z-10 Attack Helicopters

Electronic Engine Control software was exported to China without a proper license. YouTube

How An American Company Helped China Build Its Cutting Edge Z-10 Attack Helicopters -- Business Insider

For those observers of China’s aggressive efforts to modernize its armed forces, it certainly did not come as any surprise that the country sought foreign technology for use in the development of its
Z-10 attack helicopter. Recent high profile projects, such as the completion and launch of China’s first aircraft carrier in 2011 – the refurbished Soviet-era Varyag – and a number of other defense projects have relied heavily on foreign technology.

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My Comment: Americans spend billions on R&D .... China either copies or spends token amounts for the same tech. To me .... there is something clearly wrong with that formula.