A certain Deaths End reality question from people who have multiple read throughs(Just finished the first read), spoilers ahead.

This question is with regard to the dark forest strike on the solar system that would take down all matter into two dimensions. So. Just finished my first listen to the audiobooks. Wow. Wish I’d read them years back. In any case. Below are my own suppositions(And I won’t be upset if I’ve misread these. Correct away if I have it wrong). I was interested to see that there are at least two higher level societies policing the Milky Way(I’m assuming way more, but the evidence of at least two is from **Singer** seeing that the San-Ti have been wiped out by someone else). Making sure no beings become interstellar warmongers(?). But they seem to also be wiping out any intelligent beings even if they haven’t shown interest in leaving their solar systems. Obviously it pays to be quiet in the dark forest. So. I was wondering if there’s further information on the two dimensional weapon. When it gets activated, we know it’s not expanding at the speed of light(Even though the only escape velocity is light speed), and doesn’t get deactivated. So it’s just slowly eating everything. But because it’s not eating faster than light, presumably that still makes it a localised weapon? No matter how quickly it eats a solar system, that’s still a snails pace. Just making sure I have got that right. Is there info on the **Singer’s** civilisation being four dimensional? Is that a given? Or was I reading too much into the fact it had access to a lot more info? I loved the whole series and was brought into it by the show being so great. My wife told me a few years back about how great it was. But, like an idiot I waited till now to read it. I’m going to start rereading it again once I have the full framework of the story in my mind. Also, with his white robes and long white hair and beard, did anyone else picture Luo-Ji as Pei Mei? Even if it’s not mentioned above, I’d love to hear everyone’s fave parts of the book. I’m also a fan of the show and hope that gets renewed.