Xiao Zeyu and the others had gone through over a dozen battles these two days. Xiao Zeyu had used his trap tactics to defend the port with a force ten times less than the enemy.
With their experience escaping from famine, they wouldn't starve to death even if they had no food. The seafood was salty, and they would get thirsty if they overate. However, they didn't have clean water. Xiao Zeyu and the soldiers had been so thirsty for the past two days that their throats were on fire. Their lips were so dry that they would bleed if they spoke. After the tsunami, the air was scorching. If they continued to be so thirsty, they would lose their ability to fight.
Xiao Zeyu learned from Su Qing's method of escaping famine, collecting dew on the grass daily. However, that amount of water was like a cup to put out a burning firewood cart for the army, but at least the soldiers would not collapse from thirst.