Eleent value chain is a decentralized ad resource aggregation ecosystem. Through its unique "neural network" and smart contracts, inventory is classified in detail and idle inventory is consolidated. Advertisers and advertisers can freely exchange fragmented advertising information, and exchange and increase value between different fields through an "effective value chain". Through the circulation and encouragement of the EVC ecosystem, the ecosystem can operate efficiently and automatically, realize autonomous management within the ecosystem, and improve the conversion rate coverage and profitability of advertising resources.