It appears that Russia is very cognizant of the growing problem in China. The “one child” law there has resulted in a ballooning population of males without female partners. I’m not sure at what point the 18-40 year old unnattached male population will reach critical mass, but I expect the Russians to be watching closely.
Russia is reducing to 1 million in its ACTIVE army. Russia possesses a very large reserve component (5-15 million able to be called up quickly). The draft is to help fill this reserve force.