One of LIULI's most popular and limited-edition art pieces is the "Signet of Courage," which combines the minimalism of a simple shape with intricate carvings. The lines on the piece's side form a mountain scenery, while a symmetric and concentric design elevates a dragon to a prominent focal point, symbolizing reverence for the divine and heavenly. This respect serves as an homage to the natural world, which is considered the domain of the dragon. The artwork pays tribute to tradition, heritage, and the natural world.