{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can blockchain technology contribute to the development of smart cities?","a":"Data management: Blockchain technology ensures secure, reliable exchange and sharing of urban big data through distributed and decentralized data management, providing infrastructure support for  smart cities."}]}],"pr":"89b8727f115565873dd3ccbeb971402c8a044b0ee7d1d4ad17b0b8f405199bc0"}