They were 16 when they met
The first time Su An escaped, when they were 19 years old, Chen Zhe came to her and said, "If you want to get rid of our popular and spicy drinkers, ask me if I have any"
The second time Su An escaped, they were 23 years old. Chen Zhe came to him and said, "Su An, do you have any new tricks?"
The third time Su An escaped, they were 24 years old, and Chen Zhe didn't go to find her...
When Su An came back, they were 31 years old. Chen Zhe said, "Su An, I miss you, do you miss me?"