And of course Weibo search doesn't work for Uyghur content. Try finding this post using any of the words in it: https://m.weibo.cn/detail/4606432605644442 I found it by searching for Uyghur words in Latin script to find someone posting in Uyghur, then looking through their posting history.

I think Weibo is pretty much useless as a source of unfiltered information, unless you're already a heavy Weibo user and can just stumble across things instead of having to rely on search.