{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the scalability issues of blockchain?","a":"Capacity constraints: The data volume of the blockchain account book continues to grow, causing the entire blockchain to become increasingly large, and the time and resources required for query and transaction verification also increase, further limiting the scalability of  the blockchain."}]}],"pr":"acba37c37de3e2488b5b1129e94bed842c50d24da5e050276a9c146ba9df731e"}