{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"The current major bottleneck of blockchain technology is:","a":"Performance and scalability:  When faced with a large number of transactions, the blockchain system is prone to performance bottlenecks. Due to the limited generation time and processing capacity of each block, the transaction speed of the blockchain is slow, and it cannot meet the requirements of high-concurrency processing. In addition, the scalability of existing blockchain networks is also poor, making it difficult to cope with scenarios involving large numbers of users."}]}],"pr":"51474e507195d55e66fbbc759fce53f4d1e2de839b223c13e9f62c7974ed22d6"}