Zhejiang Putian Integrated Housing Co., Ltd. (also known as "PTH") has been dedicating itself to one-stop solution of low-rise prefabricated houses. The service ranges from architectural design, production, storage and transportation to installation instructions and after-sales service etc. PTH, headquartered in Keqiao District of Shaoxing City, has more than 200 emplyees and a long history. In 1998, PTH began to produces steel structureal parts. In those 10 years, PTH production emphasis has gone through the transformation from the production of door and window fittings to the protecting system of houses, then turns to the building structure , and finally upgraded to integrated housing production.