Qingdao Yongxin Curtain Walll Co.,ltd. is manufacture and exporter of windows，doors and curtain wall. We have engaged in this industry for 20years.We have ISO9001certificate.We also cooperate with famous SOE construction company in China ,such as China State Construction Engineering Corporation and China Railway Engineering on many large project.Our finished project is five-star hotel，commercial buildings，government buildings，say Sophia International Hotel,Linyi Customs Building,China cigarretes group etc.We also have experienced design team can offer you characteristic styles as your request.Sincerly hope we could cooperate with you on the basis of mutual benefit.