The genre of prudence and longevity. The moment Zhang Wu opened his eyes, he became the lowest-level jailer in the Great Kun Heavenly Prison. While others found this place filthy, chaotic, and dangerous, he discovered that prisoners had money, nobles had secrets, experts had martial arts manuals, and even the emperor might hide in the heavenly prison when trouble struck. His longevity golden core could not be exposed, and his true strength could not be carelessly shown; he could only hide, calculate, conceal, and leverage external power, using a bucket of rice, a pot of wine, and a voice transmission to simmer the heavenly prison into his own resource pool.