伴她一天如一年伴他一年如一天
[bàn tā yī tiān rú yī nián bàn tā yī nián rú yī tiān]
The phrase means 'Being with her for a day feels like a year; being with him for a year feels like a day.' It expresses how time can feel different depending on who you're with—either very long or very short, often due to the intensity of feelings.