If you want to expand territories, sacrifices are inevitable.
Zhouyang and their group are all Foundation Establishment Cultivators, making it less likely for casualties to occur.
However, the other two groups of Zhou Family Cultivators weren't so fortunate.
Those two groups, while not encountering Tier Three Demon Beast enemies, and having Foundation Establishment Cultivators Xiao Ying and Zhou Guangxiang leading and protecting them, still faced casualties when attacked by demon beasts several times their number.
Xiao Ying's group was better off; although she doesn't enjoy magical combat, she didn't hesitate to kill low-tier demon beasts.
Moreover, while her combat skills are lacking, her healing abilities are quite impressive. As long as Zhou Family Cultivators following her weren't fatally injured, she could quickly suppress their injuries, even directly cure them.
So the Zhou Family Cultivators with her, though some were injured, none died.