Apparently, there is no Good Samaritan law in China (or at least that region) and a previous case in that region set a precedent or furthered the mindset that helping a stranger could lead to being legally responsible for the event.
"It isn?t ignoring, it?s not daring. If one were to encounter a Nanjing judge, one would be screwed.
[Note: "Nanjing judge" refers to the infamous 2006 case of a man named Peng Yu who helped a woman to the hospital after she had fallen only to have the old woman accuse him of knocking her down. The Nanjing judge in that case ultimately ruled that common sense dictated that only the person who hit her would take her to the hospital, setting a precedent that continues only further discourages and reinforces many Chinese people's wariness to help others in similar situations.] "
Still a fucking disgusting display of inhumanity, but at least it shifts the blame a bit towards bullshit laws and fear instead of just not giving a shit.