{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain solve the problem of centralized data centers?","a":"Reliable data: Blockchain uses encryption algorithms and timestamp technology to ensure that the data in each block cannot be tampered with. Once data is recorded on the blockchain, it is difficult to tamper with it, thereby ensuring  the authenticity and credibility of the data."}]}],"pr":"edda9f0bffb5670529d22285fec96ceac04f50cf8f2c37a09667410b1cffc2d6"}