OEC (Online Education Chain) is a public blockchain for the education sector, developed by an international tech team. It serves as an ecosystem platform for online education and employs Multi-Sig P2SH and Big Data Privacy BIP32 technologies to encrypt and transmit all data information. OEC aims to establish a global blockchain-based education ecosystem through its token, the public education blockchain, and online education platforms. This initiative seeks to reshape the trillion-dollar global online education market and bring successful blockchain-based education projects to fruition.