In most third world countries the primary cause of death is infectious disease and in most developed countries it is heart disease. In China it is cancer.
I'm not sure if you know this, but China has so many people they don't know what to do with them. They won't even let you have babies! Given China's record on treating people nicely, I'm sure plenty of them will get the "Take two aspirin. Don't call in the morning," treatment.
Cancer is a good thing, as far as China's leadership is concerned.