Well, I see your point, so I restore the deleted post.
But,
The Marines are in reality now focus on Taiwan, but not always.
Plus, some of Taiwan's tanks suck, but the M60A3s aren't exactly bad when fighting 63As.
I am sure the CMs aren't the only stuff that will be on shore even on Taiwan, and there are the artillery, but that's another thing.
Then again, there aren't much good opponents like it in the region, other than Japan and ROK.
But really, where are the type 77s?
Those type 63 APCs are nothing but pillbox ducks. Not even pillboxes.......