Old Emperor's youngest son originally planned to join the army, but now that the borders are stable, there's no need for so many young people to risk their lives on the battlefield. The military has reconsidered and removed young men with severe myopia and most young women from the reserves.
The next step is to remove some young people who don't meet certain conditions—injecting more youth into production is the new strategy for the Changtangians. After all, many places need various tools, from vehicles to weapons, bullets to armor, all requiring workers.
Overall, protecting the lives of current soldiers is the focus of the Changtang Military right now.