1950, Qingdao Daxin Waya Works, Address: Shenyang Road, Qingdao, China
1967, anadzatchedwa Qingdao Waya Works, wasamuka kukhazikitsanso, Address: Middle wa Shandong Road, Qingdao, China
1985, anadzatchedwa Qingdao Chingwe Ntchito yolalikira Factory
1995 yosamutsa kukhazikitsanso, Address: No.243 Jia 308 Highway Qingdao, China
2000 athu RHH Chingwe ndi THHN waya anazilemba up
2011 yosamutsa kukhazikitsanso, Address: No.16, Jifalongshan Road, Environmental Protection Makampani Park, Jimo, Qingdao, China
