姐妹是一辈子的情人
[jiĕ mèi shì yī bèi zi de qíng rén]
'Sisters are the sweethearts for life.' It emphasizes the close and affectionate relationship between sisters; it implies they will always take care of each other like lovers do throughout their lives. The use of this phrase shows deep sisterhood love among family members and the bond they share over lifetimes.