Who is Chang Wong from Armageddon: The Cosmic Battle of the Ages and what is their importance?

Chang Wong is the young computer genius, who is present in Babylon when the city goes dark. Afterward, he travels to Petra to continue his work. Chang has the Mark of the Beast on his forehead, and when he arrives at Petra, he pleads with the elders to help him pray for its removal. It is removed and Chang is grateful. Chang falls in love with Naomi, and the couple plans to marry after the Glorious Reappearing.