Thank you to Air Canada employee Andrew Yiu who put this offer up on Flyertalk and encouraged the sharing of it, so here you go:
“We would like to celebrate the arrival of summer with you by offering special online only deals throughout July and August with very attractive discounts!
So check back each week for different deals!
For the first week:
20% off all Economy class fares
15% off all Executive class fares
Valid between Canada and Asia.
Valid on AC operated flights only.
All travel must be completed by Dec 15, 2009.
Enter W7MZ4BH1 under Promotion Code.
This particular deal will be valid until Jul 5.”