well it depends on what unit you are talkin about. in general cat A units train like hell. they have a lot of ammo to spend and the requirement is pretty high as well. cat B units dont get that kind of stuff, which is y when war comes they'll have to train up for it whereas cat A troops can fight any time.
its different from smaller armed forces like the canadian forces,where a reservist can be marksman if he takes the course...but then again the CF is like 1/10 of PLA's cat A unit in size lol.