The TNN development limited (TNN) is a comprehensive group, major in\r\nmanufacturing and international trading in the field of Pharmaceutical Raw\r\nMaterials, Fine Chemical, Food additive, Natural Oil, Inorganic chemicals.\r\nTNN is located in Dalian, which is the most modernized industrial city and \r\nimportant port in the Northeast of China. \r\n\r\n
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