When everyone retreated to the second line of defense, the elderly and children who were weak in combat immediately retreated to the lower part of the third line of defense and continued to dig the soil on the outside of the city wall. This would increase the height of the city wall and make it more difficult for the zombies to attack.

Anyone looking at the dark mass of zombies outside knows that the most critical moment has arrived, so everyone is working extra hard.

At this moment, everyone forgot whether they were from the Dragon Kingdom or the Yue Kingdom. In everyone's hearts, there was only one belief: everyone around them was their brother or sister. Everyone united and worked hard to make their own contributions.

"Alright, this depth is good. Dig outwards, dig as much as you can!"

Uncle Li did not go into battle, but personally directed the rear to create better fighting conditions for his comrades fighting at the front.

Everyone here is a superhuman, with great strength. And with so many of them, even though most of them are elderly people and children, their efficiency is not much weaker than that of modern excavators.

The newly excavated mounds of earth were transported inside the city walls to reinforce them, giving the zombies no chance to use them.

"Is the charcoal grill ready yet?"

"It's cooked!"

"Very good, quickly pour the burnt coke into the pit!"

This was a solution that Uncle Li suddenly came up with: pour the red-hot charcoal into the pit that had just been dug out. If any zombies attacked this pit, they would be burned to death even if they weren't scalded.

Upon hearing Uncle Li's order, the person in charge of burning coke hurriedly poured the red-hot coke into the deep pit, and the temperature of the pit immediately rose considerably.

"Not enough, keep burning coke, the more the better!"

Uncle Li glanced at the coke poured into the pit, felt that it wouldn't be of much use, and told everyone to continue burning charcoal.