Panda Express is a fast casual restaurant chain serving American Chinese cuisine. It operates mainly inside the United States, in casinos, shopping malls, toll plazas, supermarkets, airports, railroad stations, strip malls, theme parks, stadiums, college campuses and The Pentagon. It is the largest chain of Asian fast food restaurants in the United States.In 2004, the company began opening stand-alone restaurants with drive-through windows.Panda Express has 1,500 restaurants covering 42 States and Puerto Rico. There used to be Panda Express locations in Japan.The chain offers a variety of food such as the popular orange chicken, Beijing beef, Mandarin chicken, and Kung Pao chicken. Combo meals are served with fried rice, steamed rice, chow mein, or mixed vegetables. No MSG is added to any of the items at Panda Express after it has been delivered to the restaurant, nor does Panda Express purchase from any suppliers who add MSG prior to delivery.