我姓李却不在你心里我姓刘却没有留住你
[wŏ xìng lĭ què bù zài nĭ xīn lĭ wŏ xìng liú què méi yŏu liú zhù nĭ]
A rather poetic expression conveying sadness. 'Li' is my surname but I can't reside in your heart; even though my name starts with ‘Liu’, I wasn’t able to retain you, highlighting feelings of being unimportant or unwanted to someone they love.