Group 1 - The Beijing Aircraft Engine Maintenance Project has been completed, covering an area of nearly 60,000 square meters, and is expected to begin maintenance on its first aircraft engine by the end of the year, promoting high-level aviation maintenance, high-end manufacturing, aviation services, and technological research and development in the capital airport's economic zone [1] - The project is a joint investment by Air China and Rolls-Royce, featuring facilities such as the main overhaul workshop, test cell, oil pump room, and storage [1] - The total investment for the project is approximately 2.242 billion yuan, with the capacity to support up to 250 engines for maintenance annually and an expected workforce of 800, providing world-class maintenance, repair, and overhaul services for various Rolls-Royce engine models [1] Group 2 - The project is currently in the final preparation stage for production, with top-tier maintenance and testing equipment set to be installed, and technical and production teams preparing for in-depth training and process rehearsals [1] - The project aims to obtain CAAC/EASA airworthiness maintenance certification by the end of the year, with the first aircraft engine maintenance expected to commence at that time [1] - The Beijing Aircraft Engine Maintenance Project will effectively fill the gap in the maintenance of Rolls-Royce Trent series engines in mainland China [2]