The coin cloud chain was established using the latest Litecoin technology, which subverted the traditional trading mode. Coin Cloud Chain reviews and stores the information of products at every stage, achieving information recognition. At the same time, using the "decentralized" characteristics of blockchain, Coin Cloud Chain has established a technology based trust system for trading platforms, which can establish trust relationships between both parties without the involvement of third parties. Therefore, in the Coin Cloud Chain platform, due to its immutability and traceability, participants have absolute trust in the fairness mechanism of transactions, ensuring the normal operation of transactions....