What is the nationality of the UFC Heavyweight Champion who attended the Art of War 12 Fighting Championship ? 
Art of War Fighting Championship:  Its largest event was Art of War 12 - Invincible, held at the National Olympic Sports Center Auditorium in Beijing on May 23, 2009 to an audience of around 6,000 fans. Art of War Fighting Championship:  The event attracted many international guests, including former UFC Heavyweight Champion Tim Sylvia, renowned ring announcer Michael Buffer, and experienced referee "Big" John McCarthy.
i don't know