In the first year of meeting, Qi Yan and Zhu Zhu didn't know each other; in the second year of knowing each other, there were always two people on the asphalt road at the crosswalk; in the third year of knowing each other, Zhu Zhu sat on Qi Yan's bicycle seat and smiled so hard that her gums were exposed; in the fourth year of falling in love, Zhu Zhu told Qi Yan, "Yan, I have a boyfriend." In the fifth year of separation, Qi Yan and Zhu Zhu were strangers. When he was young and his love had just begun, Qi Yan spent three years waiting for him but could not get his sincerity back. After struggling and entangled, he finally let go and returned to his true nature. When he was young and ignorant, timid and shrinking, Zhu Zhu spent three years to recognize his heart. When the clouds and mist cleared, his old friend had already left. Where does it originate and end? How deeply affectionate. "Qi Yan, I'll give you ten years to give you a look back."