China needs a lot of food , one or two bad droughts and they are in a mess and no one can bail them out. In all likely hood they would go to war with Russia to get their cropland and other places in the East.
the solution to their food issues is vertical farming.
small towns of high rises.
each growing different foods.
soil recycling.
water recycling.
power production on site.
rail in and out.
create 1000+ of those towns and it’d make a sizable dent in their food issues