... Chumboon Iron-Printing & Tin-Making Co., Ltd, set up in 1992 -. Nanhai Chumboon Iron-Printing and Tin-Making Co., Ltd, set up in 2005 -. ... Guangzhou Chumxin Metal Products Co., Ltd, set up in 2010 -. ... Guangzhou Chumboon Tinplate Trading Co., Ltd, set up in 2006 -. Tianjin Chumboon Iron-Printing & Tin-Making Co., Ltd, set up in 2010 ...