

The invasion of Grenada took twelve days, from the coup to US intervention.
The invasion of Panama took five days between Panama declaring war and US having boots on the ground.
The invasion of Afghanistan began fifteen days after 9/11.
Maybe Americans really do think in hours while Chinese folks think in centuries. But even by that standard, a 2050 invasion would be a bit slow.
The island-hopping strategy that paved America’s way to Tokyo isn’t forgotten. China needs to defend some 7,200 islands off its coastline in the event the US decides to launch a first-strike. That means being able to retake territory they lose, which means needing landing craft to get them there.
For some reason, American China-Watchers only recognize one island as possible contested territory when you’ve got whole archipelagos that rival militaries would compete to secure. That’s before you get to Chongming Island or Hainan Island, both pivotal to Chinese domestic security.