IOST is a blockchain application platform developed for online service providers supported by sequoia, zhenge and other global first-tier dollar investment institutions. After the launch of the main network, IOST has officially become the global Top 4 DApp public chain platform except Ethereum, EOS and Tron. IOST achieves the goals of horizontal expansion and high throughput through the design of the PoB consensus mechanism and the second layer extension scheme. Provide a platform for third party developers, creators, and enterprises to realize value by developing community-owned networks in an effective way. IOST is more decentralized than EOS based on DPoS mechanism and more scalable than ETH's intelligent contract platform.