Dash Car Chain 3.0 (DACH3) is a decentralized automotive ecosystem data service platform built upon the transparency, trustworthiness, and irreversibility of blockchain technology. Through distributed storage and circulation of multi-dimensional data across supply chains, data chains, and value chains, DACH3 facilitates the standardization of auto parts, whole vehicle production, vehicle circulation, owner consumption, vehicle usage, driving behavior, residual vehicle value, and automotive finance data. These processes include data chaining, conversion, traceability, and data-triggered applications. The 3.0 ecosystem will serve 240 million users in the future, empowering the physical automotive industry. As the application scenarios for Dash Car Chain continue to grow, DACH3 will gradually enter a deflationary economic era. Smart contracts will execute the token burn mechanism, reducing the circulating supply of DACH3 in the market and enhancing its market value.