"Chu Yang, if you see the first ray of sunshine tomorrow morning, remember to share it with me." If Jiang Yiguang hadn't had Chu Yang in the past twelve years, there might have been a moment of warmth in her world, and people were free, so they chose to part ways.
Concept: A relationship may not necessarily have a good outcome to prove its quality, to prove the quality of the relationship in the story. Maybe not being able to see each other for a lifetime is the best outcome for them.