I didn't watch the video, my wife did on a different site and we both read some articles trying to explain some of what occured. We have a 2 year old and I empathize with parents in tragedies like this far too easily. I did actually have to close the window she was watching it in, because she was horrified and just kept repeating "oh my god" over and over. Later, all my wife wanted to do was sit on the couch and hug the Wee Man... who loves his mama but got a little impatient because he wanted to go play... and that almost brought me to tears, thinking of that little girl's family and what they had lost.
The reasoning behind this, well I was shocked in articles where the driver reportedly said it was cheaper for him to pay a death benefit than to pay for her hospital care, when he realized he had hit the girl and so proceeded to let the second impact happen. Thats almost to a 2nd degree murder stage, IMO, as he made a decision to act in a manner he knew would probably prove fatal to the girl. If Chinese law DOESN'T punish that, something is very wrong but the tone of the articles was almost that it wouldn't be; I don't have a high opinion of China to begin with and this just reinforces the negative feelings.
Yeah, its their society and who am I to criticize how they do things in their country when we have injustices in ours? Well, we may not be perfect but we do try to correct wrongs in our society, even if progress is sometimes slow. I just think any government that allows this type of occurence is failing in one of the prime functions of government: to protect its citizens. It should not be of less consequence to kill a child than to rescue it.
As for the bystanders refusing to act and nearby shopkeepers discouraging intervention, I don't buy into any of the evangelical "its because they are godless" crap that is being spouted in some corners but I do see some other contributing factors. China was (is?) governed by a totalitarian dictatorship and fear is a weapon of those types of regimes. I can understand (but have a hard time forgiving) a certain level of "do not get involved" or "do not call attention to yourself" coming from that kind of environment. There is also factors like population density, standard of living, and to a degree the cultural biases against women (which are going to bite the Chinese real soon when all their young males have no mates because families are only allowed one kid and they all want sons...).