The plant imported from the United States and Hong Kong two diodes full production lines, advanced high degree of Automation equipment. Four devices factory is China Machinery and Electronic Industry, the Ministry sentinel plant, the main production of various kinds of silicon diodes, the output can reach 50 million, the main products reached 1980s advanced level. 20/100-50/100 products to the United States, Hong Kong, Europe, Southeast Asia and other countries and regions.