Legends of the Civil Investigation Bureau: Memoir of Encouragement.

Summary

In a mysterious pool, Qiu Lao Er and others drink water believed to extend life, based on an old immortal's inscription about nine hidden immortality elixirs. When Qiu Lao Er pulls a hidden ring, the pool bottom suddenly collapses. Surprisingly, thirty missing people are found unconscious at the pool's bottom. A lightning strike awakens them, and they are rescued by the Gui Jia brothers. Throughout the event, an old man named Gui Bu Gui watches with a peculiar, knowing smile, suggesting he understands more about the situation than he reveals.

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