Hanfei had met Chu Chu a long time ago. At that time, he had a vague feeling, but he didn't know that it was love. It wasn't until he had more contact with Chu Chu that he understood that some feelings can be hidden even if you don't want to hide them. If you hide them implicitly, they may be more passionate.
Chuchu and Hanfei met several times but never knew that when she was disappointed in love and wandered alone in the steel city, she inadvertently turned around and met the man who was stronger than her and could block all storms. She felt that it was the luck she had earned in her life, and Hanfei said that it was destiny.