1950, kendao Daxin Fil Works, Adrès: Shenyang Road, Kendao, Lachin
1967, chanje non Kendao Fil Works, Demenajman rekonstriksyon, Adrès: Presegondè nan Shandong Road, Kendao, Lachin
1985, chanje non Kendao Kab Works, faktori ekspansyon
1995 Demenajman rekonstriksyon, Adrès: No.243 Jia 308 Highway Kendao, Lachin
2000 nou RHH Kab ak THHN fil te ki nan lis pa UL
2011 Demenajman rekonstriksyon, Adrès: No.16, Jifalongshan Road, Environmental Protection endistri Park, Jimo, Kendao, Lachin