At a dark moment in Duan Wenxuan's life, he met Gu Handong
Treat it as the only light in your life
When the man who was somewhat similar to him came back, he knew it was time to leave.
Gu Handong thinks Duan Wenxuan is just a little stand-in he keeps
But when he disappeared, he panicked
Intention: I am who I am, not anyone's substitute