PLA motor pool is small up untill relatively recently , therefor PLA have to keep the ability to be foot moblie more then the US army .If you have a machine gun that can be hauled around relatively easily I don't see why you can't consider it general purpose. Except maybe the .50 rounds weighs too much for foot infantry to carry?
Even a 7.62 ammo is quite a handful for the troops to carry around . let alone a 50cal with all of it's equipment ,a tripod , a lot of ammo , and even a spare barrel, so battle order for a 50cal section is 3-5 man depend mostly of how many ammo you would want to carry.
That compared to a GPM that on paper is 2 man team ,but mostly is just 1 guy alot of times on the field.
Think of it this way , I used to go on gurd duty with 5 mags of 5.56 , a short barrel M16 ,a helment, an old M-1967 load carry equitment with 2 canteens, and that felt a lot of weight to stand around for hours on end , let alone to march or run in. And that would be less then what a 2020's kit would be , with the radio , batteries , ceremic platings ,night vision, and all kind of gizmos on the gun itself.
Every gram feels like an extra , and for a typical 200-400 meter engagement, a 7.62 fired at you would still be an emotionally significant event, no one would be lying on the ground thinking " oh it fine, it is a 7.62 so it only has 20% of kinetic energy of a 50cal "