The problem(s) of poison being added to Chinese food for profit has been going on for a very long time and is systemic. Chinese food has been killing clusters of Chinese on a regular basis for a long time and no one in power cares enough to stop it. We are only hearing about this lately because now that the West imports food from China the same abuses are affecting members of a large group of people who believe that this behavior is unacceptable.
One may search for other CPF threads where this same topic has been hashed over (and over). In fact, at least one of those earlier threads was all about adding MELAMINE to foods, just like the cases in the news now. They were sorry, they fired someone, they executed someone -- and they pronounced the problem solved.
I do not knowingly buy Chinese food. We also buy food months in advance of it's use which makes others the canary in the coal mine for us, at least to a certain extent.
I suspect that the Chinese are actually learning lessons from all of this -- but I doubt that they are the lessons that would occur to most of us. I'd imagine that they would go out of their way to not poison our cats again. The outcry that was caused by that hurt them far more than killing humans in the West ever could have.