She is three years older than him. These three years are a time difference that can never be overcome.
From the back seat of a bicycle to the shore of Weiming Lake, from a phone call every day to drifting away. There was no betrayal, no quarrel, just two people who were getting better and separated after running away.
Later he went to Europe and she stayed in Beijing. When they reunited, he gave her a bookmark:
To the one who taught me how to love.
She taught him how to love. He taught her how to let go.
Two people who are both getting better, lost to different growth rhythms