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Colin Huang, chief executive officer and founder of Pinduoduo, poses for a photograph at the company's office in Shanghai, China, on Friday, Feb. 24, 2017. Pinduoduo, or PDD, is a kind of Facebook-Groupon mashup that Huang believes could revolutionize e-commerce. Photographer: Qilai Shen/Bloomberg via Getty Images

Colin Huang, chief executive officer and founder of Pinduoduo, poses for a photograph at the company's office in Shanghai, China, on Friday, Feb. 24, 2017. Pinduoduo, or PDD, is a kind of Facebook-Groupon mashup that Huang believes could revolutionize e-commerce. Photographer: Qilai Shen/Bloomberg via Getty Images