Maybe out of a billion, it's not that much, but still, why are so many Chinese willing to poison innocents in order to hurt their enemies? It's anybody's guess about why Yang Bin got arrested. But I'm sure the average Chinese person will believe it's only the capricious nature of the justice system that nailed him while others go free.

Update
Many analysts and diplomats take Yang's troubles as a sign that China is displeased that North Korea launched a plan to develop a free-trade area and named Yang to run it without consultation. Even though North Korea is just imitating the the special economic zones that kicked off China's great economic expansion nearly two decades ago. (Zones that some argue are modelled on similar areas in Taiwan.) So I guess China's behavior is only what one can call neo-imperialism.