China is a very backward society. You will not believe it, until you live there.
I had passengers who refused to board and encircle the airplane, so we could not start engines. I had people banging things inside the airplane. I had 4 passengers not leaving the airplane after landing in Shanghai 8pm. I had to stay on the airplane till 6 am. Police never intervenes, because if the Pax are chinese, they are not sure about their guanxi (the pax could be a wife of somebody important). If it is a foreigner, they are more brave, because guanxi is unlikely.