'Return to the Ming Dynasty as a Prince' was a novel, and the last painting was part of the plot. The painting was an ancient famous painting depicting the style and scenery of the Ming Dynasty. However, because the story was set at a certain point in time in the future, it could only be opened 500 years later. Five hundred years later, the protagonist needed to go back to the past for some reason and opened the painting at a critical moment. However, because the painting had been preserved for too long, the contents inside had become blurry and some parts had even been damaged. Therefore, the protagonist needed to mark some information on the painting so that future generations could correctly interpret the contents of the painting. The painting was opened to tell a historical story, and the background of the story was in the Ming Dynasty. Through that painting, the protagonist could better understand the style and scenery of that time, and at the same time, it also showed the passage of time and the changes in history.