The secret of Wow Delano forging needs to be exchanged for a new forging formula in the furnace in the fortress forging building. [Delano Forging Secret] Pick up the binding and make a CD every day, a book every day.

[Draenor Forging] You can raise the player's engineering limit to 700, and learn some Draenor forging formulas. Players can buy from professional merchants in the main city of Ashland at the price of 100G, or unlock the task through the items dropped by monsters.

If the player doesn't have a fortress to forge a building, he can take the building to the player's fortress and exchange it himself.