Hunan Tuotian Road & Bridge Engineering Machinery Co., Ltd. (daga baya an kira: Hunan Tuotian) an kusa a birnin masu baƙin ba - Chenzhou (Hunan), mins 20 daga tassantin Rail guda a Chenzhou Xi, Min 15 daga garin akwai ƙasar Chenzhou Beihu da mota. An sake tsara Hunan Tuotian daga Hunan Long March Road & Bridge Equipment Manufacturing Co., Ltd. da Hunan Shenghua Steel Structure Construction Co., Ltd, wanda shi ne kamfani na karɓan hanya & Bridge da ke haɗa aiki, sayaryi, kafa da kashe, wurare da kula da kuma kula da shi. Aiki na musamman sun ƙunsa da: 321-ayyu, taro da zafi da aka rubuta a kansa, wato 200--ya Tiro a cikin gari. Ƙarfafan ginin gine da yawa, lambufan gine da sauransu.