What memories made Bai Chen suffer? It was a memory that took place when he was still a naive child who didn't know that the world was so cruel and merciless. Not everyone would give him candy even if they smiled at him, and it was possible that they would give him a needle that would prick his palm instead.
Bai Chen lost his biological parents when he was six years old. His parents died in an accident, and since he had no relatives to take care of him, he was sent to an orphanage in hopes that some kind people would adopt him and give him a new life.
Yes, orphans in an orphanage would always hope for kind people who would take them under their wing and give them new happiness. Maybe that was also Bai Chen's simple hope when he was still living in the orphanage.