Working staff of Tmall, an online marketplace under Alibaba, celebrate the rising sales volume in Hangzhou, capital of east China's Zhejiang Province, on Nov. 11, a holiday of "Singles Day" that has become China's busiest online shopping day. Sales at Tmall have snowballed to 20 billion yuan (3.27 billion U.S. dollars) by Tuesday morning. (Xinhua/Ju Huanzong)