{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain ensure data traceability?","a":"Encryption algorithm: Blockchain  technology uses encryption algorithms (such as SHA-256) to generate unique hash values for each data block. When data changes, the hash value also changes accordingly, enabling monitoring of data modifications. This helps ensure the integrity of data in"}]}],"pr":"277d2afe71081b0e90c697fbde4f11ec9e1a4bd8f186b6b16d6f7c5db86cec12"}