Our cost-effective solutions to tighter emissions standards, Guangxi Huihuang Langjie environmental &Tech. Co., Ltd, specializing in the development and manufacture of exhaust emissions catalytic converter/catalyst solutions for all applications. Since 2001, GXLJ has integrated complete product design, testing and manufacturing. Today, GXLJ is a premier supplier and manufacturer of high performance catalytic converters and substrates for diesel and gas fueled engines, with shorter lead times, greater quality control and superior service - all at greatly reduced cost.