你是我心头上的一块心疤
[nĭ shì wŏ xīn tóu shàng de yī kuài xīn bā]
This internet name 'Ni Shi Wo Xin Tou Shang De Yi Kuai Xin Ba' translates to 'You Are a Scar on My Heart'. This phrase expresses that the person or thing mentioned ('you') deeply affected and left a mark on the user's heart, signifying deep emotions such as love, pain, or regret.