{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the types of nodes in a blockchain network?","a":"Private chain node: A private chain refers to a blockchain system that is only accessible to  a limited number of participants, and the nodes are responsible for processing and validating transactions within the network, jointly maintaining the stable operation of the blockchain."}]}],"pr":"be7fc352f79fbd5b0e9f866d6ff98001aaf2f015811ce0e0addc39910b714f97"}