That day in the "Goodbye Time" coffee shop at No. 52 Ping'an Avenue?
Tears burst out of his eyes the moment he turned around. Chun'an understood that once you turn around, some things will last forever. For example, she and Su Chen became strangers A and B from then on. After they turned around and left, they were separated from each other back to back without any end.
Xu Chunan and Su Chen no longer have any relationship.