Old key chain in the shape of a small Earth globe Editor’s Note: Si Shen is the co-founder & CEO of PapayaMobile, the Beijing-based mobile company that operates AppFlood, the largest global mobile RTB ad network out of China. Before Papaya, Si worked on Google’s mobile team in the U.S. and China.   In 2014, China-based Alibaba had a record-breaking IPO on the U.S. stock market, China surpassed the U.S. in terms of… Read More