The rice variant is resistant to high PH level water, but it still need lots of water to grow, I don't think this variant of rice has anything to do with dry land. Wheat is a much better choice.
That' a good 250km x 250km of land
We just gotta get our older agrarian generation through retirement and we can move to higher GDP/capita
I truly believe if China can one day transform the deserts into habitable land.
Problem with desert is that there is almost no nutrient in sand, so any plant that lives there can barely survive itself, no extra production of protein and carbohydrates can be made for human consumption. Of course with plantation (wild grass) desert can be useful, at least no moving sand.