Silvery Dragon, a private enterprise, majors in the research and production of Prestressing Concrete steel products for 34 years. Silvery Dragon was founded by Xie family members led by XieTieqiao in 1978. The company majors in the research and production of PC steel drawing dies and PC products. It is the model of the Chinese private citizens, and also the successful example of Opening up policy by Chinese government in 1978. As a PC products producer, Silvery Dragon€™s product covers all types; she owns the biggest output in the world. Up to 2012, SD is capable of offering all kinds of PC steel products to the customers in the whole world, including single PC wire, 2-wire, 3 wire&7 wire strand, PC bar and PE strand. We can meet any requirements of standards and specifications from customers, and develop all kinds of non-standard PC steel products for customers. According to the output and sales volume in 2008, Silvery Dragon has already been the biggest producer for PC steel products in the whole world with the annual output of 400, 000 tons. In 2011, the sales volume will reach 300, 000 metric tons; the total volume of business is almost 1.8 billion RMB. Silvery Dragon is one who export PC products earliest and keeps the biggest quantity of exports and owns the largest numbers of certificates. In 1996, Silvery Dragon exported spiral rib PC wire to Bangladesh. In 2001, she exported PC bar to Vietnam; in 2003, she exported PC strand to the USA; in 2004, she exported PE strand to Panama. Since 2000, SD keeps the top position for the volume of export. In 2012, SD exports 115, 000 metric tons products to 63 countries in the whole world with the volume of business 0.126 billion US dollars. SD has obtained 9 certificates from China, German, UK, Spain, Sweden, Norway, South Korea etc., while another 5 certificates are in the process. Silvery Dragon is the inventor of spiral drawing die, spiral drawing technique, spiral rib PC wire and spiral rib PC strand. In 1991, S