{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the main concepts in the Evidence module within the blockchain?","a":"Evidence Chain: The evidence chain is a chain-like data structure connected in chronological order in the blockchain, which contains  data in each block header and block body. Each block header contains the hash value of the previous block header, forming an unchangeable chain structure."}]}],"pr":"af9c62a9d081d0bbc12b885eb95f99eedf4c70b82f8ce74cd36ee8abe1c7ce50"}