It was supposed to be a national triumph, but instead it became a serious embarrassment. Four years ago, Chen Jin s star rose fast after he unveiled a new computer chip. It was billed as China's first home-grown digital signal processor - the kind of chip that forms the guts of devices from digital cameras to mobile phones. Buoyed by millions of dollars from both the central and Shanghai governments, Chen set up a company called HISYS Technology to mass-produce the chips.
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