{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to create a data snapshot for blockchain upgrading?","a":"Obtain blockchain data: After determining the timepoint, it is necessary to obtain all the block data before that  timepoint from the blockchain network. This data includes two parts: block header (Block Header) and block body (Block Body). The block header contains the metadata information of the block, such as"}]}],"pr":"bf2b4d02de3e1f8c8417f8740a7f59c1940e4223fd5b5a69a80bf27b826ec845"}