Once deposit is settled and clients confirmed to start the production, we will notice factory to start production and order details cannot be changed. Besides, for some urgent orders, we will notice factory to start the production once clients confirmed the order even deposit is not settled, so order details cannot be changed after clients confirmed invoice. If changes must be made, we need to check with factory about the production status, and discuss with factory if it is feasible to make the changes before we reply to customers.