{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the physical storage of a blockchain?","a":"The physical storage of a blockchain refers to the actual data content stored in each node (computer) in the system. In a blockchain system, each node needs to store a part of the blockchain data, including block headers and block bodies. Block headers save the metadata information of blocks, such as the publication time, hash value, etc., while block bodies contain transaction records and other relevant information. Nodes gradually build a complete blockchain data structure by continuously downloading and storing new blocks. It should be noted that full nodes store all data of the entire blockchain, while light nodes only need to store partial key data to reduce the storage burden."}]}]}