{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to create a data snapshot for blockchain upgrading?","a":"Determine the snapshot timepoint: First, it is necessary to determine the data at  which timepoint of the blockchain to take a snapshot. This timepoint is usually a critical node in the blockchain, such as the time of an important transaction or a periodic timepoint."}]}],"pr":"47bc3de2f2b20e8a5842a7f077f44945a56bfabf0fa037c7adde10fe471069f5"}