Tang Yan (C, front), founder and chief executive officer of China's mobile social networking platform Momo Inc. attends the ceremony of ringing the opening bell at the NASDAQ in New York, the United States, on Dec 11, 2014. China's mobile social networking platform Momo Inc. listed its shares Thursday on the NASDAQ global select market. The company announced that its initial public offering of 16 million American depositary shares (ADSs) was priced at $13.5 per ADS for a total offering size of $216 million dollars. [Photo/Xinhua]