It was definitely for the Plaza Premium Lounge. I forget what the price was, but normally it's HK$150 for adults using the lounge for 2 hours and HK$250 for adults using the lounge for 10 hours.

I splurged the 7,000 Asia Miles to introduce my brother to the CX Lounges. Next time, he gets to sample the Plaza Premium Lounge. (My Asia Miles can be put to better use if he has less than an hour to enjoy himself in the Wing or the Pier. That said, he loved the Pacific Sunrise. CX makes good cocktails!)