{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"The development history of blockchain is as follows:","a":"Birth of Bitcoin (2009): Satoshi Nakamoto created the first Bitcoin block, also known as the Genesis Block, marking the  official birth of the Bitcoin financial system. At this time, blockchain technology began to attract attention."}]}],"pr":"e077ea9b4b61a13cb4a17370a384ac284a6c9f8e48215fd9e2e10de8b5ee4bcd"}