HANGZHOU, Dec. 12 -- The online payment transactions of Kuaidi, a major taxi application, reached 12.8 billion yuan (2 billion U.S. dollars) from the period of December 2013 to November 2014, the company announced Thursday.

Kuaidi, backed by Chinese e-commerce giant Alibaba Group, introduced Alipay Wallet, a mobile payment platform, last December. More than 72.6 percent of Kuaidi's users now use Alipay Wallet to pay their fares, up significantly from less than 10 percent last December, according to the Kuaidi.

The cities of Shanghai, Beijing, Guangzhou and Hangzhou accounted for nearly half of Kuaidi's online payment volume.

Kuaidi currently has more than 100 million users and 1.35 million drivers across 358 Chinese cities.