Bags in the domestic development, but thirty years, from the old old suitcase, and later gradually increased the luggage iron pipe, which is commonly known as the rod, pipe, the name has become a trolley bag. The petrochemical industry in the past era of underdevelopment, the main raw material is leather box, box is called "luggage." Today, with the great development of the petrochemical industry, the production of "luggage" is also a great wealth of material, non-"cortex" box in power, but we are still habitually "box" called modern box.