What does it mean to be born in the sun?

Literally, it means growing and living towards the sun. A deeper meaning is to face life positively and optimistically like the sun and bring warmth to people.

Xiangyang is a metaphor for suffering from loss. From Song Ceng Gong's The Arrival and Qi of Mingzhou.

Introduction to Born in the Sun;

Born in the Sun is an urban health drama directed by Liu Jiacheng, starring Rulu, Wen Ge, Dānlín, Gao Xuyang and Mi Lu, and featuring Jin Chen and Shi Jingming.

Based on Xiong Dun's real experience, the play tells the story of a young cartoonist, Xiong Dun, who was in adversity when he suffered both emotional and workplace setbacks, but bravely fought against his illness and insisted on smiling to face life, which infected everyone around him.