It just so happened I have to be in Shanghai 4/22 to 4/27. I got home from HKG-DFW-LAS last night, turned on the computer, and saw this fare. Hopped online, purchased DCA-ORD-PEK R/T for $450. However, they must have been in the middle of fixing the error, as my outbound booked into business, but my return was in coach, business on return was about 1800 extra. But I'm booked 4/20 to 4/27. Got my systemwide confirmed for the outbound, sitting in my favorite seat, 1J. On the return, waitlisted, but have 31J as of now. Love how the timing just happened to work out on this.
Dan