Hunan Cheng connects company of limited company of science and technology to register capital 900 million yuan, total assets evens more 5 billion yuan, year sales revenue 2 billion yuan, employee 1000 much people. Ranked 2004 " Hunan Province 100 strong companies " the 43rd.   main industry is in centrally " Changde achieves yuan of industry garden " and " Cheng connects industrial garden " .
         shows project of this company sewage disposal to pass the means that discuss mark, its tall refined aluminium board belt foil the design that issues liquid waste to handle station equipment, make reach for goods, installation, debug move reach check and accept award Hunan Qing Zhiyuan limited company of environmental protection science and technology, equipment includes to abandon latex pump, useless latex to handle charcoal of biology of device, aeration to filter device; Pump of pump of coating machine liquid waste, liquid waste of group of hot-rolling corrode washing trough, counteract liquid waste of the processing chamfer, straightening machine that pull a turn to handle biology of device, 2 class to contact oxidation tower, unifinication full automatic clean water implement, float oil dross is absorbed machine.
         this project is in construction.