Saiou Machinery Co.,Ltd is an enterprise spcialized in research development of plastic machinery and Pre-stress plastic corrugated pipe complete set of equipment,it is located in Zhangjiagang cityof jiangsu provine,which is a national civilized city and international garden city.It is near Shanghai,Nangjing,Suzhou,Wuxi and ChangZhou,etc.which are rater rather developed in economy.It is near the Yangtze River and sea. Both land and river transports are very advatageous.