Simply put, it's about containing the Fan Army through strategic reprisal.
Given the situation at the time, it seemed the Fan Army had already reached the outskirts of Yibao, ready to attack the city at any moment.
But in reality, the advancing forces of the Fan Army never crossed Gujranwala.
With the troops the Fan Army deployed, even if they could capture Gujranwala, it would be the end of their strength, making it impossible to take heavily defended Yibao.
Furthermore, the Fan Army had no plans to advance towards Yibao.
In September, the focus of the Fan Army was on the Lahore side, specifically utilizing long-range artillery against the Bakistan troops deployed west of Lahore, particularly targeting several field artillery units. Additionally, they deployed fighter jets to contest air superiority with the Bakistan Air Force, mostly resulting in inefficient air battles.
