Chang was a senior admiral serving in Starfleet in the 24th century.
In 2375, Captain Jean-Luc Picard of the USS Enterprise-E sent a report to Starfleet Command requesting instructions regarding his encounter with a large armada of Palami warships. Admirals Ch'ufftha and Chang were expected to respond, but they were busy due to a major attack by Jem'Hadar forces in Sector twelve. Instead they gave instructions to a lower-ranking Andorian admiral to respond to Captain Picard. (TNG graphic novel: Forgiveness)