{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology solve the credibility issue of data?","a":"Security: The  blockchain uses cryptographic algorithms to encrypt and secure the data, making it difficult"}]}],"pr":"157463f8889614bccf311a2a747643918fe019e5030cb8e4099c6b6878f00704"}