At the age of sixteen, Ashina Crescent Moon was chosen to marry the Western Turks.
Before leaving, she only asked for three things from Emperor Taizong: her father's Hengdao, the sweat-blooded horse from the Western Regions, and the astronomical official named Shen Zhibai in Sitiantai.
Everyone thought that she wanted Shen Zhibai to observe the sky and deal with Turkic wizards. Only she knew that she just wanted to take him with her - even if she knew she would be thousands of miles away and never return.
He was the youngest astronomer in the Tang Dynasty. He could calculate the waxing and waning of the sun and the moon, and the shifts of the stars, but he could not calculate his own heart. She is the daughter of two worlds, living like a lonely moon between Chang'an and Tianshan.
Later, he died on the observatory outside Suiye City, still holding the copper ring of the armillary sphere in his hand.
She lived for many years and became the most noble kedun in the hearts of the Turks, a locust tree and a tomb without a tombstone.
At the end of the story, there is a ballad on the grassland: the stars fell on the hillside and turned into stones; the moon hung in the sky, shining on every flower.
Concept: There is always a beam of light that will illuminate your spring, summer, autumn and winter.