Before leaving, the Tang family shared with them food and water.
The group of people was not like the outrageous ones before them. After working together on their way here, they had more or less figured out their character. They were people who they could trust. When they saw they had food, they knew their personal standings and did not ask for them.
The Tang family was more than willing to share their food and drinks with them.
Their generosity astonished them.
Some of them declined with blushes on their faces, knowing how precious food and water had become.
Some simply took them and gobbled the food with water regardless of whether it was delicious.
If you refused to eat, you wouldn't have the strength. If you didn't have the strength, you wouldn't be able to fight the zombies.