Trade Mode: If two players are close to each other, one can can click the other's avatar image with the right mouse button. Then you can choose the "Trade" Option, then you can open the trade interface.
How to Trade:Edit
When you open the trade interface, you can drag the items to the Trade Items column and then input the trade amount and click "Lock". After the both players have locked their selections click "Trade" to finish the trade. After the trade is completed and items/money have been exchanged a 5% of the trade value Trade Tax in will be charged in Tael.
Note: Be sure to stand still during the transaction so that it does not become interupted.