Autos at 170 MPH Replace China Rice Paddies at GM Tracks
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About 2 1/2 hours’ drive west of Shanghai, the patchwork of paddy fields and small factories gives way to a giant oval embankment, partly shielded by a metal fence and clumps of trees.
The gatehouse is the first of several barriers to keep prying eyes from restricted areas; uniformed guards roam the compound’s 37 miles (60 kilometers) of roads; guests are handed black plastic stickers to cover their mobile-phone lenses.