{"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":"f15681bb12336f7d70d7472e6fbb88d5ec17c30488772535dfdb5f204442c505"}