Just like Xuu You had guessed, the situation was indeed as he speculated, but Chen Xi hadn't deployed troops in Chiping simply to guard the river crossing; rather, he had prepared three food supply routes from the start.
Chen Xi was well aware of how many defeats have been caused by food shortages, and he absolutely wouldn't tolerate losing to such a basic tactic. Therefore, anyone who knew of his arrangements for the food supply routes would definitely not consider disrupting them—an attempt would be nothing but a trap.
Afterward, Zhuge Liang asked a few other questions. Once sure there were no significant oversights, and that Chen Xi had indeed made all the necessary arrangements well in advance, they discussed nothing further, focusing instead on how to respond.
