The document discusses the rise of social media and networks in China. It describes how bulletin board systems (BBS) were popular early online communities in China, with over 3 billion registered users. Many BBS systems were built on Discuz!, an open-source platform founded by Kevin Day. BBS sites remain influential in China for discussing news and trends. Social networking sites like Tencent and WeChat now integrate social features with messaging and mobile access, driving further growth of online communities in China.