Unlike the West, China's Central Committee is predominantly run by people with engineering backgrounds. Long term thinkers skilled in maths. So ask yourself who is going to die of starvation. It certainly won't be the Chinees as they have been planning for this for decades.
The post-fossil era means going back to living within land-carrying capacity. For the Netherlands, where I'm from, that means back to 4-5mln. people....but we are heading for 20mln. So guess what is going to happen to the 75%, 15mln. surplus population. We will be begging Russia to let us in or die from starvation. Welcome to the new rationale.