{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to solve the problem of increasing storage space for chain state in blockchain node maintenance?","a":"Chain-based Storage Structure: Adopt a chain-based storage structure to efficiently manage the growth of chain  state storage space."}]}],"pr":"b2f6c584bf3808e87694f8891828e5ef90afd86a674341ddd54d00da8cabc920"}