We introduce this sub-micron ultra-high-precision DLP 3D printer. Relying on advanced optical focusing technology and precision motion control components, this printer has achieved precise exposure with a minimum spot size of only 5µm and printing with a minimum ultra - thin layer thickness of 1µm, laying a solid foundation for high-precision printing at the hardware level. Paired with the self - developed high - precision photocurable resin formula, its unique chemical composition ensures the uniform curing of materials at the micro-scale, thus achieving sub-micron 3D printing with clear details within 10µm.