We cannot make sure there won't be islam extremists idiots who blow themselves up in China. However, we can make sure they will go to hell quickly, either with a bullet in the head, or burned to ashes. We will make sure whoever get involved, no matter it is their sons, parents, wives or relatives, all get serious punishments, death sentence are mostly preferred for them.
We will not have prison for them since it will totally waste China's precious money. We would rather spend it on our roads, education and other urgent needed areas.
One thing we Chinese can make sure is that: We will pound them so hard and let those bastards know that death for them is just the beginning. We will torture whoever involved into a state that they will vow to their god that terrorism in China is really such a bad option for them.
We never say it won't happen. However, we will make sure that those revenges done by Israelis, Americans, Frenches or Russians towards to those terrorists will look like so lenient and humane. Do not trust what I have said, well, you had better try it.