Wanwushield is a decentralized chain application for item protection based on blockchain technology. Our aim is to provide a decentralized and publicly recorded item maintenance platform for all things in the world, and create the world's first item "medical insurance" . Based on the advantages of smart contracts and immutable records of all employees in blockchain technology, All Things Shield greatly improves the execution efficiency of guarantee contracts and avoids many problems such as repeated claims and malicious claims. Guarantee contracts and maintenance results are recorded in the blockchain and cannot be tampered with, ensuring that all interaction records can be traced and located after disputes arise.