Because Jin Zijin spread rumors, telling the people of Xining that Prince Five is a rebel and listing his multitude of crimes, he wanted the citizens of Xining to know that the Imperial Court was focused on capturing the rebel and had no intention of causing harm to the innocent.
In other words, this war had nothing to do with the common folk.
No one wanted to go to war; by the end, the civilians even broke into the various Governor's Offices, seized the officials within, and voluntarily delivered them to the Imperial Court's army camps, welcoming the Court's troops to enter the city.
After so much turmoil, the struggle over Xining was finally drawing to a close.
"Jin Mocong, lay down your weapons and go to the capital to admit your wrongdoings to the Emperor. This is your only way out."