- Designing, manufacturing, distributing and installing industrial equipment and machineries.

- Providing consultancy and manufacturing services on steel structures, spare parts in mining and transporting coal and other ores.

- Trading coal, metal ores and other equipment.

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27 April 1982: Mao Khe Mechanical Plant was established as a member of Uong Bi Coal Company;

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30 December 2004: Mao Khe Mechanical Plant was transformed into  Mao Khe Mechanical Joint Stock Company;

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Juy 2007: Mao Khe Mechanical Joint Stock Company became a subsidiary of Vietnam Coal & Minerals Industry Group (VINACOMIN) under the name as  Mao Khe-TKV Mechanical Joint Stock Company;

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2009: Charter capital was raised up to VND 9,786,000,000;

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2010: Charter capital was raised up to VND 11,938,920,000;

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April 2011: Renamed as Mao Khe - Vinacomin Mechanical Joint Stock Company;

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2013: Charter capital was raised up to VND 14,325,780,000;

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22 September 2015: Traded on the Upcom market as a ticker- CMK;