He and she were born in the same hospital, in the same ward, but were only five years apart; he and she had been childhood sweethearts for fifteen years; he went to study abroad at the age of eighteen, and she settled down to study at the age of thirteen; he and she had known each other for fifteen years, and fell in love across seven years of time and space.
Xiaoyu'er, I'm back. Xiao Yu'er, please be my girlfriend. Xiao Yu'er, let's get married.