USA first big drugstore chain institutions, mainly engaged in drug retail, and grocery retail. Wall Green is a legend in the history of the world enterprises, since the last century, Wall Green not only survive, but also many other well-known competitors have fallen when, the booming development history, in his 100 years in annual profit, created 100 years of continuous profit myth, it is by virtue of their own impressive performance frequently boarded the "fortune" magazine's "best performance and most respected enterprises" list!