{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How do testing and validation nodes in a blockchain verify programs related to the main network deployment?","a":"Download and synchronize the latest block data of the main network: Validation nodes need to first download and  synchronize the latest block data of the main network to have a complete history record of the main network in their local databases."}]}],"pr":"504d1582723565a00d79cedf5577a2d74f3e2458d04a14e673b70df238d3e518"}