誓言就是对自己的撒谎
[shì yán jiù shì duì zì jĭ de sā huăng]
'誓言就是对自己的撒谎' means 'A vow is a lie to oneself'. In Chinese context, many believe vows should never be broken but some may think making a promise equals lying as it's almost impossible to keep all promises. This nickname indicates skepticism towards vows.