DDN (Data Delivery Network) is a new generation of data distribution network based on blockchain technology (details: http://ddn.link), an upgraded version of CDN (Content Delivery Network). Its core is MatrixChain, a bottom-level system of blockchains created by the Ebookchain team over the past two years, focusing on data deposit, data distribution, copyright protection and knowledge realization. Its classic applications include Ebooker, Starchain, Art Traceability system, Sample library management system.Through the means of DDN pledge rapidly expand to the film and television, works of art, health care, insurance, Internet of Things and other industries, formed a huge economic ecology based on the underlying blockchain. Next, DDN will also be online at major domestic and international exchanges, promote a depth development of the Value Internet/