OEC credit currency is a certified public chain certificate based on blockchain trade, transaction and agreement. OEC is committed to using blockchain, distributed storage and point-to-point transmission technology to build a decentralized public chain ecology. This ecology allows every user engaged in trade and free transactions, and even every agreement generated by credit and consensus to freely build, publish, store, and produce irrevocable and erasable certification effects. Through the form of decentralized autonomy and certification, digital assets are issued and circulated to provide credit and value transmission for public chain ecological users. Trade, transactions, logistics in the supply chain, or transactions and agreements between entities or individuals, can use OEC to realize the guarantee of agreement validity and transaction value.