ETEC (Electronic Cigarette Chain) is based on blockchain technology, integrating both consortium chains and public chains while incorporating multi-chain mechanisms and cross-chain protocols. It aims to provide a solid and innovative technical foundation for the electronic cigarette industry. On one hand, ETEC leverages the transparency of public chains, incorporating Ethereums smart contracts to reduce business execution costs and make rules transparent, fostering trust among unfamiliar transacting parties. On the other hand, Electronic Cigarette Chain (ETEC) adopts the privacy protection benefits of consortium chains, meeting merchants and users requirements for the privacy of information and transactions.