Because the desolate coast held the possibility of sea monsters appearing, their camp was still maintained at a safe distance from the shoreline. They had to send people to carry each heavy bucket of seawater back before boiling could commence.
This was an extremely labor-intensive, low-efficiency task, and moreover, incredibly strenuous. The guards had to take turns working, carrying water from morning till night. Everyone's shoulders were red and swollen from the carrying pole, their clothes drenched in sweat.
Fortunately, there were not many people in their castle, and the demand for salt was not large. Even using this manual method to harvest salt would be enough for their entire castle to consume for a long time.
