1220 *1830mm,1220 * 2440mm. Setting up stalls in luggage case has become a mainstream way of small-scale entrepreneurship and a popular way of "temporary workers" employment. The light boxes used in the car are 1220* 1830mm and 1220*2440mm, which are good in size, convenient and quick. Light box refers to a box-type sign or advertising device made of glass and equipped with electric lights.