Since 2006, the renminbi exchange rate has been allowed to float in a narrow margin around a fixed base rate determined with reference to a basket of world currencies.
This added about 1.3 million readers to the magazine's original circulation of 100,000, although the magazine promised its advertisers a base rate of 700,000.
This statistic often surprises people, due to the base rate fallacy, as many people do not take the basic incidence into account when judging probability.