After the 'Pain Game', the fact that 'the total number of communities is a multiple of 8' is something all Imitators surely know.
The only question is whether there are 24 communities or 32 communities.
In the 'Endorsed Game', there were indeed players from Community 31, but Lin Sizhi was not aware of this information when designing this game.
The highest community he had matched to was 24, which is the community where Shen Qingyun is.
But he still chose to guess there were a maximum of 32 communities.
Of course, there is a gambling element in this, but the choice was mainly based on two considerations.
First, the matching mechanism of the Walkway does not tend to always match communities never encountered before, but tends to match more frequently with communities where there was previous hostility.
