一、现状与问题大同是以能源、原材料工业为主的老工业城市。工业总产值占工农业总产值的87.4％，第二产业增加值占国内生产总值的52％，工业经济在全市国民经济中占居主导地位。在全国、全省经济格局中占有举足轻重的地位。从现状看，大同工业结构主要呈现“三化”特征，即：? I. Current situation and problems Datong is an old industrial city with energy and raw material industries as the mainstay. The industrial output value accounts for 87.4% of the total industrial and agricultural output value, the secondary industry added value accounts for 52% of the GDP, and the industrial economy occupies a dominant position in the city’s national economy. In the country and the province’s economic structure occupies a pivotal position. Judging from the status quo, Datong’s industrial structure is mainly characterized by “three changes”: