Chang was a male Human Starfleet lieutenant in the mid-24th century. In 2364, he served as a TAC officer on Relva VII, where he oversaw prospective cadets taking the Starfleet Academy entrance exam. In that year, Chang introduced himself to Wesley Crusher, Oliana Mirren, T'Shanik, and Mordock, all of whom were vying for the Academy position. All four finalists participated in various exams, including the hyperspace physics test. Later, Chang set up a confrontation in a corridor, wherein Wesley and Mordock seemingly offended a Zaldan officer, and congratulated Wesley on recognizing the cultural complexities involved in resolving the dispute.