Zhen Chan hadn't experienced the feeling of "sleeping" for about ten thousand years. When he still had a physical body, he occasionally slept. Although high-level cultivators don't need sleep to restore energy, natural sleep can still alleviate mental fatigue. After his physical body had been destroyed, he had also forgotten the function of "sleeping."
When he woke up, he felt the smoothest he had in ten thousand years.
However, he soon realized why he had fallen asleep. After Sage Zhi Long's phantom finished refining the Mathematical Ring, he cast an unknown law on him—perhaps a highly profound Soul Calming Spell—and then he fell asleep. Needless to say, it definitely involved some secrets that only disciples of the Mathematical Sect were privileged to know.
He was somewhat jealous of Wang Qi's luck. A complete set of immortal artifacts, and he got two pieces, which had been refined again using the Modern Artifact Refining Map...