In Hainan Island, the Mid-Autumn Festival is never just a full moon in the sky, but also an ancient dialogue between people and the sea. The short film "Sea Moon" uses the strokes of the national style animation to dive into the depths of the moonlight on the coast of the South China Sea and salvage the folk pearls that are about to be submerged by the modern wave, so that the temperature of the Li culture can brush the shore again with the sea breeze. "Sea Moon" is not only a love letter to Hainan, but also a beacon floating on the tide of the times. It tells us that the real cultural protection is to let folk customs live in people's breath and love. With the sea moon rising, it will not go out from generation to generation.