{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can blockchain technology be applied to product traceability and food safety?","a":"Smart contracts: Smart contracts in blockchain technology can automatically execute contract terms, achieving automation among all parties in the  supply chain."}]}],"pr":"df8169a7d9ba9c30c868b49c5ae04a230c75b8df995b029d000a7648f5d99c99"}