{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the smart contract solutions on the sharding architecture in blockchain technology?","a":"Layered structure: Separate balance transfer and smart contracts for processing, and handle all balance transfer and global contracts at the bottom layer using a proof of work (POW) mechanism, solving the global consistency and  double-spending issues."}]}],"pr":"08667db5bdacb5307751f9560b0add8e8ef7ab21490c46402491586c25f6b2fe"}