{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How are blocks generated and reached consensus in a blockchain?","a":"Constructing block header: Miners construct the block header (header) according to a certain rule, including information such  as the hash value of the previous block (prevhash), the number of transactions in this block (txcount), and the block generation time (timestamp)."}]}],"pr":"6da7ebb599fa36c7628d56f225a42baa9c0add64482f2b62c9a331c1f6d65c65"}