{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to avoid long-range attacks in blockchain?","a":"Weak Subjectivity:  Require all nodes on the entire network to periodically check the latest blocks, and reject blocks that reorganize overly distant records. By frequently checking blocks, ensure that during the token release period,"}]}],"pr":"ab75a14687cda567255c4f9326c253347240da93900e08a1246c5ed26595070f"}