One could say that Yan Gui and An Chen were forcibly sent away by Mo Shangjun.
After all, the two men had a task at hand, and the discovered white powder had nothing directly to do with them. Now that Mo Shangjun, in her capacity as commander, had ordered them to leave and continue with their exercises, they had no reason to stay.
Despite this, some time after leaving, Yan Gui figured out a way to secretly report the matter to another superior—Ji Ruonan.
Mo Shangjun followed the traces onward.
She hardly needed to search deliberately; all the traces were easily exposed, as if no anti-reconnaissance techniques had been used. Aside from the obvious white powder they had encountered earlier, not a single trace could be found further on the road, which increasingly seemed like the powder had been spread there on purpose.
This suggested a kind of naive, ridiculous trap that was so childish and illogical that it looked more like a lure.