The bones of mountains and rivers are hidden deep in the ink marks. The cinnabar of the paint can tell the story of heartache, and the silk of the canvas has a secret message hidden in it - cultural relic restorer Yun Xiu has mastered the secret skills of the previous court painters, and uses the unique skill of "distinguishing color and minerals" to gain insight into the book of life and death behind the painting. When the "mirror curse" enveloped the imperial city during the turmoil over the inheritance, she ground malachite as evidence and mixed the golden crow's secret medicine to break the situation. Quan Huan sneered: "Sorcery confuses the public!" The head of the imperial hospital was shocked to see traces of lead poisoning in the eyes of the prince in the painting. From the Lenggong Studio to the Royal Danchi, she unfolded three long scrolls: the original painting is like a mystery, the development is like a knife, and the mineral map is a sheath. The new emperor held her hand and sighed: "The pen is like a mirror, illuminating all the magic." On the day when the "Royal Painting Appraisal" was issued, next to the regulations annotated by her ink pen, there was a box of newly researched lapis lazuli powder, which can see through centuries of lies, quietly sitting beside it.