The people he met when he was young were so amazing that Gu Jin's heart beat for Xie Qingyan until it stopped.
Gu Jin: Being happy with you is the most beautiful thing in my heart, but it ends here.
Xie Qingyan: No matter where you are, I will find you anywhere in the world, because you have become the only one in my heart.
Intention: In the end, Zhuang Zhou dreamed of a butterfly