Complex sentence: In July 2009, Chinese weibos were highly damaged when most of the domestic weibos such as Fanfou were shut down, but it brought the birth of other weibos like Sina Weibo, which are operated by large Chinese Internet companies.
Split into simpler sentences: In July 2009, Chinese weibos were severely damaged when most of the domestic weibos such as Fanfou were shut down. But it brought the birth of other weibos, like Sina Weibo, which are operated by large Chinese Internet companies.