Alibaba's sites account for 60% of all parcels delivered in China

"Alibaba’s various e-commerce sites account for 60 per cent of parcels delivered in China; just two of its portals handled more sales globally in 2012 than eBay and Amazon combined. Half of all online payments in China go through its online payment processor, Alipay."
Source:  Profile of Jack Ma in the Financial Times, 28th September 2013

Note - this stat is also quoted in The Economist, 23rd March 2013