{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What aspects should be noticed when setting up security for blockchain nodes?","a":"Data backup: Regularly  back up blockchain node data to prevent data loss or damage, and improve the reliability of the data."}]}],"pr":"46380ed20f979e09028abe1b4421c8aca139c7193d5d2809c9b041a60b2ccf85"}