{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the scalability issues of blockchain?","a":"Energy consumption: Blockchain adopts consensus mechanisms such as proof of work (PoW), and nodes need to consume a large amount of energy to solve complex mathematical problems and reach consensus."}]}],"pr":"11c6131c72326389adf6cd5411dbdc0d893e5dd3870d39782dcec8abf33ca3f7"}