Boeing Shanghai is a joint venture between Boeing, Shanghai Airport Authorities and China Eastern Airlines. As the 787 and Next-Generation 737 Boeing Converted Freighter Center of Excellence, Boeing Shanghai provides a comprehensive range of services from engineering, aircraft maintenance and modification to component repair and overhaul and supply chain management. Its base and line maintenance capabilities also support 737, 767, 777 and 747 models and cover major and minor checks, composite repair, structural modifications including winglet and pylon, cabin upgrades, engine and landing gear replacement and full paint hangar.