WHEN China joined the World Trade Organisation (wto) in late 2001, its share of world exports stood at 4.3%. By last year that share had soared to 10.6%, and the country had become the world's biggest exporter. In addition to awe and envy, its rise has spawned a rapidly growing list of trade quarrels. China was a party to only two of the 93 trade disputes that were taken to the wto between its accession and the end of 2005. But in the five years to the end of 2010, it was involved in 26 of the 84 cases filed at the forum.
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