别用感情刀

'Bie Yong Ganyingdao' means 'Don't Use the Knife of Feelings'. This reflects advice against being too emotional, suggesting one not to let deep-seated emotions cut and affect rational thinking and behaviors, as if these emotions can act as a 'double-edged sword'. Sometimes, this can be used as a warning or advice against using emotions to manipulate others, since it can harm both sides.