{"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":"Security: Although blockchain technology has high security, there are still security risks, such as the risk of  51% attacks. In addition, poor management of private keys may lead to asset loss."}]}],"pr":"89bc7dcc7c9a3046b67aab9ef922d1133c179c3cc13353dd2a0dfcd20612457b"}