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This article describes the development and production of various electron microscopes in China , in particular the transmission electron microscope , scanning electron microscope , and electron probe X2ray microanalyzer. The first two domestic prototype electron microscopes were constructed in 1958~1959 in the Changchun Institute of Optics and Fine Mechanics , Chinese Academy of Sciences. According to a survey in 1996~1997 , the number of electron microscopes in China had increased to 2021 , including 756 transmission electron microscopes (TEM) and 1 ,165 scanning electron microscopes (SEM) . Of the total 1 ,921 TEMs and SEMs , 1006 were domestically produced (mostly medium2 and low2 grade electron microscopes) , while the rest were imported. Beijing Scientific Instrument R & D Center ( KYKY) , Shanghai Electron2Optical Technology Research Institute and Jiangnan Optical Instrument Plant produced over 95 % of these domestic electron microscopes. Yunnan University , Beijing Instrument Factory , Shanghai No. 3 Analytical Instrument Plant and the State2run 4503 Factory produced several models of electron microscopes as well.
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