Dear Wangmin,
thank you for contacting us.
I have sent a request for cancelling your order 302-9693182-0985921 to our warehouse from which this order is going to be dispatched. However I can not guarantee that they will manage to proceed this request. In case you receive an email that your order is dispatched, please contact us again and we'll reach the carrier and tell them to return the item to us. You can do that simply by replying to this email.
Should you have any further questions, please do not hesitate to contact us. We'll be more than happy to assist you.
Have a lovely day!