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Zhang Yiming, chief executive officer and founder of Bytedance Ltd., poses for a photograph in Beijing, China, on Thursday, April 11, 2019. Zhang is worth about $13 billion, according to the Bloomberg Billionaires Index, making him China's 9th-richest person and one of the fastest in modern times to amass a mega-fortune. Photographer: Gilles Sabrie/Bloomberg via Getty Images

Zhang Yiming, chief executive officer and founder of Bytedance Ltd., poses for a photograph in Beijing, China, on Thursday, April 11, 2019. Zhang is worth about $13 billion, according to the Bloomberg Billionaires Index, making him China's 9th-richest person and one of the fastest in modern times to amass a mega-fortune. Photographer: Gilles Sabrie/Bloomberg via Getty Images