This document contains information about microblogs (weibo) in China, including: 1) It defines weibo as a personal webpage for posting 140 character messages and discusses major Chinese weibo sites like Sina Weibo. 2) It provides statistics on Sina Weibo, including that it was founded in 2009 and now has over 424 million members, making it China's most popular microblog site. 3) It includes tables comparing the top 10 most followed accounts on Twitter and Sina Weibo, showing celebrities and politicians among the leaders on both sites.