JOLONG comprises the following subsidiaries: JOLONG Metal Products Co., Ltd, JOLONG Window Door & Curtain Wall Co., Ltd and JOLONG Window and Door Systems Pty. Ltd. It is a professional large-scale enterprise that integrates design, manufacturing, installation and service of aluminum alloy and UPVC windows and doors. We Jolong Group have three centers in the world, China, US, Australia. JOLONG has successively passed the ISO9001:2000 International Quality Management Systems Certification/ China National Energy-saving Products Certification/ 14001:2004 Environment Management System Certification/ Australian windows and door AS2047 certification. JOLONG has been honored as “Renowned Products” “Qingdao Famous Trademark” “Trust worthy Products”，which is the excellent member of quality and honesty community and famous brand protection organization in Qingdao .