There was a thorn in Gu Xiqi's heart that had been buried for ten years. It was quenching the poison and was buried deeper and deeper as time went by, allowing it to corrode.
Lin Zhu also had a thorn buried in his heart, oozing with honey, so he would face the sunset to uproot the thorn in his and Gu Xiqi's hearts.
"The sun has set, let's go home together."
Purpose: Love heals scars