The impact of the internet on society in China is arguably greater than in any other country on earth. Not only does it give people channels to express themselves - something which for political reasons has previously been almost impossible - but the increase of microblogging has amplified the internet's impact still further. China's most popular microblogging service Sina Weibo - run by the country's largest internet portal, Sina.com - now boasts at least 300 million registered users, making it a serious challenger to Twitter. Here we look at some examples of people whose lives have been changed by Weibo.