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1973 Liaoning L.Y.H.Y crtstals factory.(our mother factory and it is the appointed supplier of the country for military crystals supplying )

1994 Yantai Roson Electronics Co.,Ltd( the branch factory based in Yantai for civilian products produce)  

2002 Shenzhen Distribution Centre 

2005 chengdu sales branch office
2006 shanghai sales branch office
2002 HK Glory In Enterprise Limited(the oversea business contact window in H.K)