你受伤了痛的第一个是我你痛了受伤的第一个是我
[nĭ shòu shāng le tòng de dì yī gè shì wŏ nĭ tòng le shòu shāng de dì yī gè shì wŏ]
This means 'when you are hurt, I will be the first one to suffer; when you are in pain, I am the one getting wounded'. The user is indicating their deep concern for the other person, suggesting their own emotion is closely intertwined with someone else’s, usually referring to someone very special to this person such as lover or beloved family.