Shang can sometimes be seen at MGM near the Chinese Theater and Sorcerer's Hat, but is not a regular. This is the only place I've ever seen him. You may also be able to find Mulan here as well. She's usually out more than he is and usually at MGM appears in her armor insteed of the dress she wears to go to the Matchmaked which she usually wears at EPCOT. And if you like Mulan, be sure to see the Parade at MGM and the Castle show at MK. Mulan and Mushu have their own unit in the parade and Mulan and Shan-Yu have a battle scene in the Castle Show.