你以为我的心是不锈钢而且
[nĭ yĭ wéi wŏ de xīn shì bù xiù gāng ér qiĕ]
Literally translated, this means 'Do you think my heart is stainless steel?', implying that the speaker feels easily wounded by words or actions and is challenging another person's assumption that they are impervious to pain or hurt.