Recalling the stories about the Cadaver Demon's incredibly durable body, Han Li felt slight dejection. According to the rumors, he could only use true fire to slowly burn the corpse or extract the soul and seal it.
The Cadaver Demon clearly wasn't dead. It was merely restrained for the time being by the unknown golden talisman. He reckoned it would take quite a while before the Cadaver Demon would be able to recover its strength.
With that thought, Han Li's gaze fell onto the jade box at the corpse demon's side. Since it had suppressed the Cadaver Demon and still hadn't burned to ash, it must be a seal of sorts.
From how closely related the jade box was to the Cadaver Demon and the golden talisman that sealed it, it stands to reason that the box must've contained the Cadaver Demon's soul.