My wife showed me the vid yesterday. It's not like Chinese people don't care. The problem is a bit bigger. Millions of Chinese bloggers tried to find the drivers etc., not like nobody cares. There are good and bad people in every country.
I can tell you guys a personal story though that might help understand why some of those fucks didn't stop to help the girl, till the "trash" lady came.
My parents came for a visit a couple months ago. One day it was raining hella bad and I was driving on a side lane with my parents in the car heading to my house. In front of me was an old guy on a bike with an umbrella in his hand. The street went downhill, so he was going fast and could barely see anything because of the heavy rain and the umbrella. He then hit a hole in the street and fell. I of course stopped my car right away and me and my dad got out and checked on the dude. He was concious but had blood on his face, so I got back in my car, drove a couple more meters and informed a security guard about that accident and told him to call an ambulance. Then we went home.
Shortly after I get a call that I did a hit and run. Long story short, "witnesses" saw my car and assumed I hit the man. The dude ran with it and wanted money from me for hitting him. After crazy three days going back and forth to the police, he admitted I didn't hit him. The police even wanted to run a story on TV with my parents, as they know there is a problem that most people are too scared to help others, cause they might get sued. In Germany you get arrested if you don't help...
This is a big problem that is being discussed all the time in China for a couple months now. The thing is, that money is more important to most people these days than being a good person. And that is not just a problem in China.