At present, the forms of digital publishing products mainly include e-books, digital newspapers, digital periodicals, online original literature, online educational publications, online maps, digital music, online animation, online games, database publications, mobile phone publications (MMS, CRBT, mobile phone newspapers, mobile phone periodicals, mobile phone novels, mobile phone games) and so on. The transmission channels of digital publishing products mainly include wired Internet, wireless communication network and satellite network. The terminals of digital publishing products are mainly computers: PC, Mac；; The mobile terminal mainly includes: Android phone/tablet, ipone, Ipad, etc.

Zhongtian Yunxin is a digital book publishing platform, which provides complete digital publishing solutions, including the production, distribution, sales and application of digital books, and helps publishers, schools, education and training institutions, enterprises and institutions to develop, produce and publish interactive multimedia books, teaching materials and training materials with the lowest cost, the fastest speed and the simplest process.

The platform has personalized publishing mode and free cross-platform publishing options to ensure the most suitable operation mode. According to the nature of the book, choosing a personalized publishing mode can best show the characteristics and contents of the book. The completed digital books can be published and updated at the same time in various terminals such as desktop computers (desktops, notebooks, ultrabooks, all-in-one machines, etc.). ), various mobile devices (touch-screen tablets and smart phones in Android, iOS and other systems), thus ensuring the universality of book audiences.