Sina (Chinese: 新 浪; pinyin: Xīn Làng) is a Chinese technology company. Sina operates four major business lines: Sina Weibo, Sina Mobile, Sina Online, and Sinanet. RELATED: 10 LOCAL PLAYERS TO KEEP AN EYE ON THIS YEAR These. Alexa Buttons are also sold out. As a point of comparison, Alexa’ rank in the App Store had been somewhere between. six on the U.S. App Store (and climb. Cheryl Cole Blog…