{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can the data storage issue in blockchain be solved?","a":"Difficult to tamper with: The data in blockchain is linked in chronological order to form blocks, each containing  a certain amount of data. To modify the data in blockchain, the consent of more than half of the nodes is required, and the information in all nodes must be modified. Since nodes are usually controlled by different entities, it is challenging to tamper with the data in blockchain."}]}],"pr":"fa2294ce53ed90f5d055ebe7589508bffb8dd9a94cda47b7468c1e6cfc46e887"}