A trader works at the New York Stock Exchange in New York, the United States, on Nov. 9, 2017. Sogou Inc., a Chinese search engine company backed by Tencent and Sohu, rang the New York Stock Exchange (NYSE) opening bell on Thursday in celebration of its initial public offerings (IPO). Shares of Sogou, trading under the ticker symbol "SOGO", started trading at 13 dollars per ADS on Thursday, and closed at 13.50 dollars apiece, rising 3.85 percent. (Xinhua/Wang Ying)