it seems they are trying to match the extended double miles offer from UA...

at first CX is giving more-than-double miles for roundtrip travel to LAX, SFO, YVR, YYZ, and JFK from Mar 1 to May 31 (35,000 total including base miles for Y, 50,000 total including base and class-of-service for J/F, regardless of routes)...and UA was having a similar double-mile promotion during the same period for roundtrip travel to LAX, SFO, YVR, YYZ, NYC (JFK/EWR/LGA/HPN), and ORD...

now UA is kind of "secretly" (I haven't seen it advertised anyway even on UA's HK website, except I heard from my agent and confirmed with UA in HKG) extending its double mile promotion until the end of June, but now only for JFK (some agents said JFK, some still said JFK/EWR/LGA/HPN)...now CX is doing it for also selected ports only compared to the original promotion...and also doing it "secretly"...is it advertised in any newspaper or whatever ?? at least I checked asiamiles.com everyday and it is still not there (but, the Diners double-mile promo has been running for more than a month and it just showed up on asiamiles.com these couple of days)...