{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can blockchain be applied to electronic evidence preservation?","a":"Decentralized storage: Blockchain technology adopts a distributed node storage method,  storing electronic evidence on the blockchain, avoiding the security risks caused by centralized storage, and improving the security of data."}]}],"pr":"0461297a5d97cfd63ad4a9bd238e90aa8a5da0ae95b77b9d197e497da7375153"}