Richard Liu, CEO and founder of China's e-commerce company JD.com, rides an electric tricycle as he leaves a delivery station to deliver goods for customers to celebrate the anniversary of the founding of the company, in Beijing, in this June 16, 2014 file photo. China's second-largest e-commerce company JD.com Inc said it has sent a letter of complaint to a Chinese antitrust regulator and formally requested an investigation into rival Alibaba Group Holding. (Photo by Jason Lee/Reuters)
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