What's happening on Chinese social media? This is what's happening on Chinese social media: "A video clip titled 'Woman poops in elevator in Shenzhen subway' has gone viral on Chinese social media."
So, basically the same things happening on American social media. That's M.I.C. Gadget, which says that the Shenzhen subway administration has confirmed the late-April incident (where the woman pooped in the elevator while her husband stood guard) and "criticized such uncivilized behavior of passengers."
As some Weibo commenters have apparently pointed out, the fault doesn't lie entirely with the woman. After all: Humans poop! Sometimes at inconvenient times! This is an acknowledged fact about humans, and if you're designing something that many humans will occupy or pass through, it's important to consider that poop will occur.