He originally didn't think much of the things from the Swallowing Heaven Sect and thought there wouldn't be anything valuable.
After all, assassinations are risky; even if there were good things, it's unlikely they'd be carried around.
All the good and precious things would be hidden away.
Or they would be retrieved when returning; even if they couldn't come back, they'd rather hide them than let an opponent benefit.
During Super Sensing Illumination, a quick scan revealed there wasn't anything good.
But he immediately noticed the Sealing Spirit Box.
He was most familiar with the Sealing Spirit Box and remembered it vividly, so he just entered the house and stored it in the Iron Ring.
...
The three of them drifted along.
Li Hongzhao said, "Alright, you should tell me, who exactly are the two people?"
Chu Zhiyuan laughed and said, "One is short and fat, and the other has a shy smile."