{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the roles of different order types in the blockchain?","a":"Improving transaction efficiency: Order placement allows both buyers and sellers to publicly and transparently display their demands  on the blockchain, reducing the transaction costs caused by information asymmetry and improving transaction efficiency."}]}],"pr":"b9b37f6d9460e956f256fe0c4e3a6490f141c533d8682a32fbb9b4806325206e"}