Because of the emergence of gunpowder, Li Er had already ordered a halt to all city construction and city wall maintenance.

Building and maintaining city walls is completely meaningless.

No matter how strong the city wall is, can it still withstand gunpowder?

Li Er spent most of his military energy on the field army. Winning the siege in the field was no big deal.

After conquering Ji'an City, Li Er dragged all the captured defenders out of the city and ordered them to dismantle the Jingguan to collect the bones of the former Sui soldiers and transport them back for burial.

After that, another Jingguan was built in the original place.

Judging from the current trend, no one will demolish this place again.

The mighty navy was covered with Yalu water, and the pontoon bridges that were built were all filled with Tang troops crossing the river in a mighty way.

Now all Tang armies are gradually gathering here, and their only target is Pyongyang, the capital of Goguryeo!

PS: Thank you to book friend Liu Suifeng for your 100-point reward and support. I am deeply grateful. Thank you!
Chapter completed!