{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What types of smart contracts are included in blockchain?","a":"Copyright management contracts: This type of smart contract is mainly used for copyright registration, licensing, and infringement  monitoring, etc."}]}],"pr":"44750c655e776910f5a7b3d704c2362a59f7d39f1e817538078f20e2c241db93"}