There were many things that needed to be prepared in advance. If they had to wait until the end to think of a solution, they would definitely taste the bitter fruit of slacking.
Especially food, which was of utmost importance.
The hungry residents of the Heaven's Wall city couldn't hold on for long. If they used force to suppress them, it would lead to more dangerous situations.
At that time, not to mention fighting monsters, even self-defense would be very difficult, and the early stage of the operation would be in vain.
Therefore, when the defense was in progress, the food storage had been carried out at the same time, taking priority over other matters.
There used to be crops outside tianxu city, but they were not ripe yet. In the past, there would be nearby villages and towns selling rice, but now the channels were cut off.
With the outbreak of the demon wave, it was estimated that demons would run rampant outside, so how could they provide food?