时间是把无情的杀猪刀
[shí jiān shì bă wú qíng de shā zhū dāo]
This nickname translates to 'Time is a Ruthless Butcher Knife'. In Chinese culture, there is a saying 'Time Is A Killer', but this person made the idiom more specific and vivid by calling time a 'ruthless butcher knife.' It indicates how fast and heartless the passage of time can feel; it mercilessly changes everything including beauty and innocence as if it was cutting through life, making a strong image of something unstoppable that cuts away youth.