{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the challenges of blockchain technology in practical applications?","a":"Performance and scalability: The current mainstream blockchain technologies have defects in transaction processing speed, such as Bitcoin transactions being able to process only 7 transactions per second, which cannot meet the needs of the modern digital economy. In addition, it is difficult to upgrade the overall capacity of blockchain technology, and its  scalability is also limited."}]}],"pr":"cc49c66ae529f95066c6550b1468ba260b3da5f2127a12fad2d8ac2ba7b5d016"}