
New air-conditioning trains were put into trial use on the Line 1 of the Beijing subway on Tuesday, November 6, 2007. This oldest subway line will say goodbye to those trains without air-conditioners. [Photo: cnsphoto]

New air-conditioning trains were put into trial use on the Line 1 of the Beijing subway on Tuesday, November 6, 2007. This oldest subway line will say goodbye to those trains without air-conditioners. [Photo: cnsphoto]
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