He doesn't appear to be near death's gate, and there's the remains of a broken rope ladder here—it may have fallen and he with it, he may have fallen after reaching the bottom, or with the recent murders, I couldn't say.

His neck and back appears uninjured. We may need you more first, Wen Qing to tend to him after freed of the, ah, well we're in.

( just accept that Wei Wuxian found his way down the well, too, but does not quite... have the qi to spare to drag deadweight of a live man out with himself. not if he's to have any around later. )