This kind of thing will probably take off in China and Russia around 2030, that's 10 years from now, give or take. Just about when demographics will be a serious problem for both nations. Now they have a little bit time. But not that much.
1) IF it works
2) STILL looking at a 20-year lag between kids and productive adults
3) These things always have unexpected side effects (think vaxxes)
4) I am nearly alone here in thinking the ChiComs are seriously screwed both pop wise and energy wise.