姐她欺负我妹等姐报仇
[jiĕ tā qī fù wŏ mèi dĕng jiĕ bào chóu]
'Sis bullies my sister, and sis will take revenge' conveys family support where the speaker vows retribution on behalf of their younger sibling against a tormentor who shares familial ties, highlighting sibling dynamics and protection instincts among siblings.