This paper discusses the rebirth and design of China's cultural heritage in the digital era, focusing on the concept and characteristics of digital virtual products and their application in cultural heritage. Digital products are defined as contents exchanged based on digital formats or transmitted via the Internet, characterized by immortality, mutability, rapid distribution and high replenishment. Video plays an important role in digital virtual products by combining visual and audio elements to create a rich experience for consumers. The field of design has experienced a shift from traditional physical design to virtual product design, which utilizes digital technologies and virtual reality to create a virtual objective presence. Digital technologies have shown great potential for cultural heritage preservation, such as the Dunhuang Research Institute's use of AR technology to provide immersive experiences for tourists. The rise of the meta-universe concept has further expanded the digital world, with blockchain and NFT technologies providing uniqueness, traceability and authentication for digital assets. The Dunhuang Research Academy has begun exploring digital NFT to transform mural elements into traceable and collectible visual artworks, promoting the global dissemination of Dunhuang culture.