Posted in Web What is Sina Weibo ? – Definition from WhatIs.com May 3, 2019 Sina Weibo is a social networking and microblogging service based in China with more than 368 million registered users. Sina Weibo was launched in 2009 and is owned by SINA Corporation, the largest Internet portal in China. : https://whatis.techtarget.com/definition/Sina-Weibo