Huh, I saw $172 one way in Feb 2015 when I looked earlier (about 5500 Baht a/i). I don't see that fare any more on malaysiaairlines.com.

Equipment is A330; I thought it was a 777 KUL-PEK (yikes) but actually "777" is MH's published distance in nautical miles from BKK-KUL.

(Spotted this fare via my wife reading a blogger's Twitter feed which mentioned the deal but did not, iirc, mention FlyerTalk. Interesting.)