

Recently in their paid Chahuahui, when talking about the Trump-class BB Shilao/Yankee/Ayi mentioned that Trump-class might cause people to itch and revive things like the original un-nerfed proposal for 055 that's larger than the current version. They then very seriously talked about the existence of a 400mm gun that can fire ultra long range rounds. Shilao joked that a PLAN BB with three of those guns in a turret might be useful in a reunification scenario.
Is there really a 400mm gun in inventory somewhere? I know there was some work done on 203mm howitzers. And there's rumours of a 300mm gun (the so called "cross strait gun") that could fire guided long range rocket assisted rounds (they're basically shortened 300mm rockets). But this is the first case I've heard of a 400mm gun.

