There is (or was about two years ago) a pay lounge. Reasonably comfortable, nothing special. All I can remember about the location is that facing the main terminal entrance, the lounge was to the far right. It looked like a separate building from outside, but was connected to the terminal by a passage at the rear. My handler paid, so I can't even tell you how much.
While I was waiting, I remembered that I had an old friend in Kunming so I called him up and he came and met me. Just outside the terminal (cross under the flyover, through the intersection, turn right) there is a fancy hotel with quite decent dim sum on the second floor. This was a much more pleasant place to while away a few hours.