Hey this may just be what the doctor ordered. Think of it.

Both of these countries start to hurl nukes at each other and poof - instant population control. Overcrowding and malnourishment will no longer be a problem as they will both take out a large portion of their populations. But hey think of this... China will be in a mess and no longer a problem when President Trump wants to take a preemptive strike against North Korea. A win-win for everyone.