The arrest last month of four Shanghai-based Rio Tinto executives has raised fears of a crackdown by Beijing on foreign companies that would have been unthinkable a few years ago.
Under former president Jiang Zemin's reign, visiting executives of multinationals could expect to be feted in lavish style, with a banquet in the Great Hall of The People in Beijing and photo opportunities with the nation's leaders.
But after President Hu Jintao took over in 2003 the business climate for foreign companies began to change.
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