The story
From 1906 to 1972, the electricity supply service was managed by the "Macao Electric Lighting Company Ltd." (now Melco International Development), which had its headquarters in British Hong Kong. In 1972, due to non-fulfilment of its concession contract with the former Portuguese administration, the company was replaced by CEM.
CEM was restructured with the former Portuguese administration's support in 1982. In 1985, CEM signed the 25-year concession contract. It has since scored achievements in the areas of cost-effectiveness and technology.
In November 2010, the Government of Macau and CEM signed the Power Supply Contract Extension for 15 years. The new contract terms came into effect on 1 December 2010.
In 2014, Nam Kwong (Group) Company Limited purchased a 90% stake in Sino–French Energy Development Co. from Sino-French Holdings (Hong Kong) Ltd and became CEM's biggest shareholder.
In 2016, the Macau Power Station with a history of over 110 years was officially decommissioned.
From Wikipedia’s article on Companhia de Electricidade de Macau, shared under CC BY-SA 4.0.4