Randeng had his own considerations. Coming here wasn't a big deal—Taiyi had been dead for countless years already, so who's to say he wouldn't get lucky and stumble upon the Chaos Bell while making this trip?
Moreover, he wouldn't have come without keeping some backup plans in mind.
In the end, he didn't encounter the Chaos Bell but instead came across Nezha, who had it in his possession.
Although the explosion back then was devastating, Nezha actually wasn't severely injured. After being tossed into the Mountain and River Map by Lady Nuwa to escape the core of the blast, the energy of Nuwa's avatar was entirely depleted.
Afterward, Nezha ran as far away as possible, but as fate would have it, while he was trying to escape outward, Randeng was charging inward. They ended up crossing paths directly.
