Lol you guys aren't new to this forum, with that logic you may as well say China and everyone else should disband their conventional military forces and leave the entirety of their military power based on the deterrence a handful of ICBMs offer.
US may be withdrawing from Afghanastan and the chance of an invasion from that direction may be slight, but the US presence in the middle east would still be a factor in the minds of PLA planners -- whether the afghan government, or any other middle eastern government would allow US to build up troops is not up to us to speculate I think, but we all know how powerful US influence is in the region. And don't forget about India lurking on the other side of the himalayas.
Besides, moving MBTs across long distances is probably a capability you'd prefer to have, even if you don't need it that often.
US may be withdrawing from Afghanastan and the chance of an invasion from that direction may be slight, but the US presence in the middle east would still be a factor in the minds of PLA planners -- whether the afghan government, or any other middle eastern government would allow US to build up troops is not up to us to speculate I think, but we all know how powerful US influence is in the region. And don't forget about India lurking on the other side of the himalayas.
Besides, moving MBTs across long distances is probably a capability you'd prefer to have, even if you don't need it that often.