Saboteur of the Khitomer Accords. Unsuccessful saboteur. He had a run-in with the Enterprise, as Cambridge recalls.

"Reveling in your time on the Enterprise?" asks Cambridge. (Reveling is a strong word, in the language; it's something like a revel in the older English sense, only with the bent towards Klingon parties, rather more exciting overall. Cambridge is careful to slightly emphasize the name of the ship, as well.) It's something that could be interpreted as a taunt, subtly, if Chang is from late enough to understand it. He watches for the other man's reaction, carefully.