C773
In fact, as long as Yan Chu explained in the order to the city that the city was in a precarious situation, even if he was slightly anxious, Zhangsun Yuanhong would understand. Furthermore, he would rush back immediately, even if all his subordinates were to die, leaving him alone, he would still rush back to the capital to save them.
But Yan Chu did not say all of these in the transfer order