JOLONG was founded in 1992, with its headquarters in Qingdao, Shandong Province, China. Adhering to the concept of green, low carbon, environmental protection and ecology, and with the spirit of meticulous craftsmanship, the company is committed to making every door and window into a work. For 31 years, the company has worked hard to build excellent quality.JOLONG has provided systematic solutions for doors, windows, curtain walls and other products for all kinds of new, reconstructed and expanded buildings, and has strived to achieve the highest level of design, comfort and safety while meeting the customized needs of customers. Through continuous innovation and research and development on existing successful products, it has become the preferred communication object for many architects, designers, investors and private owners. For JOLONG, it is the first thing to provide support to customers and partners as much as possible. Everyone in JOLONG is looking forward to serving you. We hope to become a supplier of your door and window system. We promise to do our best to achieve more for you.