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Rilang is a manufacturer who focus on R & D and producing windows and doors with sense of design, main products are slim aluminum series, slim copper series, slim steel series and slim wooden series windows and doors.

Combination of hardware and glass,it can fully achieve the classical and modern minimalist windows and doors, the retro British and French architecture, Shanghai modern Shikumen construction and modern industrial stylish building on the windows and doors of the style and function demands, we are trying to achieve all your ideas of windows and doors.

Our business involved: historic buildings restoration, modern commercial construction projects and the projects have graphic sense and performance requirements.

We will keep working on improve the physical properties: air tightness, water tightness, thermal insulation for elegent stylish windows and doors.


  • Q The APPLETREE brand is registered by Rilang in Shanghai. The OTTOSTUMM brand is registered by Montanstahl in Switzerland.
  • A Rilang is the exclusive distributor in China, which uses Ottostumm profiles to make finished windows and doors for our projects.
  • Q What's the difference from normal windows and doors?
  • A We only focus on R&D for minimalist windows and doors which have slim profile/retro facade/industrious styles, which give a unique elegance, luxury and quality to buildings. Normal windows have quite wide profiles, which do not make graphical sense.

Contact us

  • Add: No. 6598,Linhai Road,Fengxian District,Shanghai,China
  • Fax: 021-64291595-109
  • Sales: 4006305855
  • E-mail:
  • After-sales : 021-64291595