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Company Overview：Established in 2005, RiLang Doors and Windows is a leading high-end doors and windows enterprise in China, specializing in providing customized solutions for cultural heritage buildings and luxury residences. Headquartered in Shanghai, the company has its own production base and R&D team, with over 30 years of industry experience.Core Brands RiLang Doors and Windows has three core brands:- OTTOSTUMM: A top Swiss brand for steel and copper doors and windows, serving as the exclusive strategic partner in China.- MINDOW: A Dutch brand known for its slim and minimalist windows and doors, also the exclusive strategic partner.- APPLETREE: A self-owned brand with 20 years of heritage.Products and Services.RiLang Doors and Windows is committed to providing products that combine high-quality materials, top-notch performance, and architectural artistry. The company's products include Swiss-imported hot-rolled steel system doors and windows, Swiss-imported cold-rolled ste
