Lu Yan was Bo Ning's calamity, a fatal catastrophe.
When we first met, Bo Ning was nineteen years old and Lu Yan was twenty-one.
He approached her because of an unspeakable secret and tried his best to be nice to her.
When they parted, Bo Ning was twenty-three years old and Lu Yan was twenty-five.
They turned against each other because of the unspeakable secret, and she went abroad for this reason.
When we met again, Bo Ning was twenty-seven and Lu Yan was thirty.
He tried his best to keep her, even at the risk of his own life.
A clear drop of blood, that red thread is made of blood. The person who is chained has no freedom in this life.
Not saying goodbye here is the vow she made to him, and promising you a worry-free life is the promise he made.