China plans to overtake the US becoming the world's largest online market by 2015, reports Boston Consulting Group. China's e-commerce market is expected to increase by 33% and overcome a 2 trillion Yuan threshold in transaction value by 2015 with the number of customers buying online growing to 329 million at the same period. Moreover, e-tailers will contribute 7.4% to the total retail value by 2015, being 3.3% higher than now, according to the report.