{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can blockchain technology be applied to bill trading?","a":"Building a public ledger: Through blockchain technology, various information of bills (such as  bill number, amount, rating, custody, registration, etc.) is recorded in blocks to form a public ledger that cannot be tampered with. Each complete system node can have a complete backup of the blockchain information, ensuring the security and transparency of transaction data."}]}],"pr":"8688b272423d82bfc140121dbec7526f7a05c94b32b5be0b0e951a0a4eeb0241"}