Transformers Shooting in Bethlehem, PA

Philly.com is reporting that Transformers will take a swing through Bethlehem, PA in addition to Philadelphia. "Neat twist surrounding the action movie Transformers 2, whose production will be based in Philly for the better part of June. I hear that director Michael Bay and crew also will shoot in Bethlehem, Pa., which will double as a city in the Far East." I wonder what Far East city they are doubling as and for what story purpose. (source)