{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to import and export transaction tracking data in blockchain nodes?","a":"Data Cleaning and Preprocessing: Clean and preprocess the obtained transaction data, such as removing duplicate data, fixing erroneous  data, and converting data formats."}]}],"pr":"706759d104ca2e24670842812a7d7986530e22a26cac0195224f38185ba69ffb"}