This is very simple. The theme song of Faye Wong's new song "In a hurry that year" blushes, representing shyness. It means that lovers are shy at first and red-eyed. There are two possibilities, one is anger and the other is tears. Personally, I think it is most appropriate to put tears here. This sentence means to miss the past. If two people can't be as shy as before when they meet, can they still miss the past with tears in their eyes! This should be the pure hand-to-hand combat between lovers and friends that hi said.