中昌贸易发展有限公司2003年创始于深圳。
公司秉承“以专业的广告材料、服务专业的广告人”的经营宗旨，坚信的产品是---服务。
为配合产品的供不应求，公司于2007年创办佛山市南海区长泰广告灯箱制品厂，主要生产超薄灯箱，广告吸塑灯箱。
  Zhongchang Trading Development Co.,Ltd. was established in Shenzhen in 2003. The company follows the philosophy of serving professional advertising industry with professional advertising materials .We believe that the best product is service.To satisfy the market demand, we established Nanhai Changtai Advertising Light Box plant in Foshan in 2007 to produce slim light boxes and blowing light boxes.   佛山市南海长泰广告灯箱制品厂以专业研发、生产、销售导光板超薄箱、超薄灯箱、水晶灯箱、LED灯箱、等各种广告灯箱的高科技企业。
本厂拥有2500平方厂房，引进全球先进技术、设备、材料及工艺生产出各式导光板和导光板超薄灯箱；生产能力8000-10000个/月.   Changtai Advertising Linght Box plant is a high-tech enterprise that specializes in the R&D ,manufacturing and distributing of LGP light box,slim light box,crystal light box,LED light box,etc.We have 2500m2 workshop,and import world advanced technology, equipment,material and process  to produce various light guide plates and LGP  slim light box,and the monthly production is 8000-10000PCS.    目前我们已经拥有7大系列，多种规格的超薄灯箱和导光板产品。
拥有“中昌”“冠美”、“朗顿”品牌。
“冠美”超薄灯箱以工艺好、产品质量保证、价格实惠、起货快，已成为国内外受欢迎知名品牌。
    Now,we have seven series and various specifications of slim light box and light guide plates,and famous brands such as Zhongchang,Guanmei,and Langdun .Among them,Guanmei slim light box features excellent process,high quality,low price and quick delivery,and has become a famous brand in China and foreign countries.    “冠美”秉承“以专业、专注，质量、服务共存”的经营宗旨，欢迎各地朋友上厂参观指导。
   Guanmei follows the philosophy of professional,dedication,quality and service ,and welcome to visit our plant.