Judging from engine deliveries, I'd think 30 prototypes and perhaps a slightly higher number of production aircraft. What I find interesting is comments that the J10 is a transitional model for ongoing development and China's methodology of using technology developed by others. There's no way any country will ever recover development costs from internally funded defense projects, which is going to make Chinese aircraft very competitive in the world market.

China's Fighters - Chengdu J-10

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These are my principles. If you don't like them I have others. ~Groucho Marx~

I heard Enginners spent so many years(very long time) to reasearch it,so i think PLA has not many J-10 now

(CCTV-News Channel video)
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Is this thing a fighter jet? The article said that it was based on an attempt by Israel to develop it's own F-16. Could this thing hold it's own against an F-22?

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Neither am I the means to any end others may wish to accomplish. I am not a tool for their use. I am not a servant of their needs. I am not a bandage for their wounds. I am not a sacrifice on their altars. ... I owe nothing to my brothers, nor do I gather debts from them. I ask no one to live for me, nor do I live for others. I covet no mans soul, nor is my soul theirs to covet.

Ayn Rand, Anthem.