{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How are PoW mining rules defined in a blockchain?","a":"Difficulty coefficient: To ensure the security and stability of the blockchain network, the difficulty of PoW mining increases over time. The difficulty coefficient is determined by the network's computing power, and when the computing power increases,  the difficulty coefficient also increases accordingly."}]}],"pr":"972df8c2f1e54c691639a6cadd5db2447573bf91aabef4237f12f65a6b7a656b"}