{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How is the chain structure of a blockchain composed?","a":"The chain structure of a blockchain is formed by multiple blocks interconnected with each other. Each block consists of two main parts: the block header and the block body. The block header contains metadata such as the hash value of the previous block, the random number and timestamp of the current block, while the block body contains a certain number of transaction records. The hash value of each block is generated based on the transaction data within the  block and the hash value of the previous block, ensuring a tight connection between each block and the previous one. This chain structure ensures the immutability of the blockchain, as any attempt to tamper with the blockchain would require changing the hash values of all subsequent blocks."}]}],"pr":"8eae12906ebaf2609e5b964b723651eb54c1ea12f6df0bcf83e4f994497efdb4"}