The design of double-layer mooncake packaging refers to the artistic and functional arrangement of materials and structures used to encase mooncakes, a traditional Chinese dessert. It typically involves two layers: an inner layer for protection and an outer layer for presentation. The inner layer is usually made of a moisture-proof material to preserve the mooncake's freshness, while the outer layer is designed to be visually appealing and may include branding elements. The design aims to balance practicality, protection, and aesthetic appeal.