I found a code: Edited..

0% on Tango
30% on Tango Plus
50% on Latitude
25% on Executive Class Lowest
25% on Executive Class Flexible

And it works. YYZ to PEK, $850 all in. Tango Plus.
YYZ to YVR, $520 all in. Tango+

Any clues what this is? Its working, although not sure if it is 100% legit.

P.S. Removing the code from here. Please search on RFD yourself, where this code was originally posted.