Delta is having a great sale. I guess they have some serious excess capacity on their Seattle-Asia flights.
Available from Vancouver for under $500.
I don't expect this to last long either. I'm pretty sure if you book at delta.com you can refund within 24 hours with no penalty too. Don't call the airline just in case this is a mistake fare even though I don't think it is.
Beijing is an extra hundo$
Use the miles you will get for another short free flight too.