Since he had returned to the Dusk Cathedral, Zheng Yichen didn't leave right away. He exchanged some information with others at the storage facility, and then left without much delay. He wasn't sure if there were other bases similar to this one in the world.
Even if he knew, it wouldn't be possible to visit each one. The carrying capacity of the Dusk Cathedral was limited; it could handle a little over seven hundred people without issue, but any more than that, and the people here would probably start killing each other first.
Not long after Zheng Yichen left the Dusk Cathedral, the number of people there dwindled, not because Morley's side took action to clean up, but because some people wandered around the Dusk Cathedral... and ended up in places they shouldn't have.