This took place within the sect, where deception was impossible. Yun Ze couldn't afford it, and Li Shiming didn't have to worry about such an occurrence.
The trade required a contract to be backed up onto the Identity Jade Disc. Once one party broke the contract, the sect would intervene.
This was the benefit of trading with a sect-approved merchant, which is why Li Shiming readily paid with Spirit Stones.
"Contact me if you need anything in the future!" Yun Ze said with a sincere smile, taking out his Identity Jade Disc.
The two exchanged contact information, and afterward, Li Shiming could contact Yun Ze to order items within a thousand li of the sect.
Watching Li Shiming's departing figure, Yun Ze wore a look of triumph.
He had expended favors to precisely learn Li Shiming's task location and had intercepted him outside before other trading houses could.