It may be peaceful; it may be violent.
If the authorities take meaningful and compassionate action on the deaths of children from tainted milk, earthquakes, and other causes related to lack of oversight, the next revolution will be under way peacefully. If the authorities take harsh and repressive actions on the grieving parents, the next revolution may become violent. Just look at the French and Russian Revolutions against distant and uncaring ruling classes.
See "Grieving Parents Gain Clout in China", Washington Post, 2009-03-27