The Qin Army no longer supports the critical entrance to Shu, as their reinforcements are almost unable to enter the city.
The Tang Army's artillery has nearly blocked all the roads into the city, causing heavy losses to the Qin reinforcement troops. They have become passive, unwilling to continue wasting manpower and allowing the Tang Army to deplete them.
The Dahua troops inside the city have also started to surrender on a large scale. They have lost the will to fight and the determination to resist. With nothing left, they choose to hand over their weapons honestly.
At first, only a few surrendered, but then it was dozens, even hundreds of people. These soldiers have been fighting outside for many years, and this time they finally choose to leave instead of following anyone else.
The Tang Army prepared a passage for these surrendering troops, providing them with food and a place to bathe.