yeah this come from a country who has not contribute anything new to the innovation in military appliance of civilian technology.
you're using this thread to boast about China's economy which has nothing to do with Japan's ability to develop its fighter jets.
Consider how the UK despite losing it's superpower status in the 50s and kept leading the dev on military technology, your suggestion is null.
how's your engine program btw ???
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so anyway, as this article suggest the cooperation will be focused on electronics and engine.