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Yan Luo placed Shi Mu in a valley to train for two months.
After bringing him there, Yan Luo compelled the Fallen Angel Desk to release a layer of intangible energy around his body. She left after that, vanishing without a trace.
When Shi Mu tried to contact her, there was no response at all.
Thanks to the energy from the Fallen Angel Desk, he was able to move freely without needing to worry about the erosive qi of the dead spirit. It must have been due to some magical charm used by Yan Luo on the Fallen Angel Desk.
During this period, Cai was able to connect with Shi Mu's heart. When he learned about his current situation, he was eager to follow.
That was until Shi Mu described the desolate environment there, filled with scattered bones and skeletons. When he heard that, Cai immediately changed his mind and said he was willing to keep watch over the residence on Shi Mu's behalf. He would rather die than be dragged there.