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Introduction

        The Department of Precision Instruments and Mechanology at Tsinghua University grew out of the Department of Mechanical Engineering, established in 1932.  It originally contained three separate groups: the original power engineering group, the machinery manufacturing engineering group, and finally the aircraft and automotive engineering group. During the Second Sino-Japanese War (1937 to 1945), the Mechanical Engineering Department moved South with the rest of Tsinghua University, proceeding to form the National Changsha Temporary University, followed by the Southwest Associated University.  In 1946, it returned to the original Tsinghua campus in Beijing.
        In 1952, the Department was restructured.  The Departments of Mechanical Engineering at both Peking University and Yanjing University merged into Tsinghua’s Department of Mechanical Engineering, where they split into the Department of Machinery Manufacturing and the Department of Power Machinery.  The Department of Machinery Manufacturing offered four majors: Machinery Manufacturing Technology, Metal-cutting Machine Tools and Instruments, Foundry Machinery and Engineering, and lastly, Metal Pressure Processing and Processing Machinery.  In 1956, the Machinery Manufacturing Technology major merged with the Metal-cutting Machine Tools and Instruments major to form the “Machinery Manufacturing Technology & Metal-cutting Machine Tools and Instruments” major.  In 1959, the Department began offering the Precision Instruments and Optical Instruments major.
        In 1960, the Machinery Manufacturing Department split into two departments: the Department of Precision Instruments and Machinery Manufacturing, and the Department of Metallurgy.  The Department of Precision Instruments and Machinery Manufacturing offered the following three majors: Metal-cutting Machine Tools and Automation (later renamed “Machinery Manufacturing Technology and Equipment”, in 1963), Precision Instruments, and Optical Instruments.
        In 1971, the Department of Precision Instruments and Machinery Manufacturing  was renamed the Department of Precision Instruments.  In 1972, the Precision Instruments major became the Gyroscopic Navigation and Automatic Control major.  After 1979, when the Ministry of Education made adjustments to the majors offered by directly subordinate key science and engineering schools, the Department of Precision Instruments offered three majors: Machinery Manufacturing Technology, Equipment, and Automation; Optical Instruments; and Gyroscopic Navigation and Automatic Control.
        In 1984, the Department of Precision Instruments was renamed the Department of Modern Precision Instruments and Mechanology, offering three majors: Mechanical Design and Manufacturing, Optical Instruments, and Precision Instruments.  In 1989, The Precision Instruments major merged with the Optical Instruments major to form the Precision Instruments and Meters major (renamed in 1995 to Measurement and Control Technology and Instruments).
        In 1988, the State Key Laboratory of Tribology was founded.  In 1992, the National Computer Integrated Manufacturing System (CIMS) Engineering Research Center, cofounded by the Department of Automation and the Department of Mechanical Engineering, was successfully accepted.  In 1995, the State Key Laboratory of Precision Measurement Technology and Instruments, cofounded with Tianjin University’s Department of Precision Instruments, was formally established. In 1996, the Optical Memory National Engineering Research Center (OMNERC) was formally established.
        1997 saw the addition of a new major for Industrial Engineering, and in 2001, a Department of Industrial Engineering was independently established, as part of the School of Mechanical Engineering.
        In 2004, a new major for Microelectromechanical systems engineering was added. For the first two years, its curriculum is identical to that of the Manufacturing Automation and Measurement and Control Technology major, with a separate curriculum in the third.  Also in 2004, the Department of Precision Instruments and Mechanology established the Advanced Manufacturing Technology Research Institute at the Graduate School at Shenzhen, and in the same year, established the Advanced Manufacturing Division.
         Also in 2004, the Department of Precision Instruments and Mechanology established the Advanced Manufacturing Technology Research Institute at the Graduate School at Shenzhen, and in the same year, established the Advanced Manufacturing Division.
        In 2012, the Department of Precision Instruments and Mechanical Engineering now offers the following majors: Mechanical Engineering and Automation; and Measurement and Control Technology and Instruments.