Sina Weibo (NASDAQ: WB) (新浪微博) is a Chinese microblogging website.Launched by Sina Corporation on August 14th, 2009, it is one of the biggest social media platforms in China, with over 445 million monthly active users as of Q3 2018. The platform has been a huge financial success, with surging stocks, lucrative advertising sales and high revenue and total earnings per quarter.