Beijing Nankou Rail Transit Machinery Co., Ltd. (abbreviated as: Nanji Company) was founded in 1906 by the famous railway engineer Mr. Zhan Tianyou. It is a leading domestic and world-class China CNR mechanical transmission integrated system, railway turnout integrated system, and compressed air Three specialized R&D and production bases of source integration system.

The company is bordered by the majestic Juyongguan and Badaling Great Wall in the north, and the beautiful Ming Tombs in the east. It covers an area of 847,700 square meters and has 1,600 employees, including 524 college graduates and 271 college graduates, with intermediate and senior technical titles. There are 200 personnel, 826 skilled workers and 246 senior skilled workers. The company has 935 sets (sets) of various types of equipment, including 71 sets of large-scale precision equipment and 61 sets (sets) of imported equipment. It has the ability to develop and manufacture high-precision, multi-specification mechanical products. Especially in terms of gearbox products, the company has a complete design and simulation analysis platform and type test methods. The designed products have undergone professional verification and optimization and a complete test verification process, and the products are excellent and reliable. The product technology is advanced. Among the supporting traction gearbox products of my country's largest power electric locomotive series, it has produced more than 10,000 gears. It is currently the only most stable and mature supplier without batch quality problems.

The company's existing main products: wind power series gearboxes; various types of twin-screw air compressors, noses, rotors; various oilfield machinery products; railway, urban rail locomotive accessories and various railway turnout products.

Nanji has an international cultural vision and technology platform, and its joint ventures with Sweden's SKF and Germany's Knorr-Bremse internationally renowned companies have been operating well for many years. The company has successively passed SO9001 quality management system, ISO14001 environmental management system and OSHAS occupational safety and health management system certification. The company also has a number of patented technologies.

During the century’s journey, the company has witnessed the historical development of China’s state-owned railway locomotive and rolling stock industry, and has accumulated a rich corporate culture marked by the Zhan Tianyou spirit of "patriotism, self-reliance, innovation, and dedication". It is now in "harmony, integrity, and development" Under the guidance of the business philosophy of "Prosperity and Wealth", we will strive to achieve the strategic goal of "enriching the people and strengthening the enterprise". The company adheres to the enterprise spirit of "integrity-based, innovation as the soul" and the market philosophy of "for the sake of users and satisfying users". Welcome to visit and guide, go hand in hand, and create brilliance together!

The company started to use 3 sets of SRC-200SW (flow 28.5m³/min, pressure 0.8MPa, voltage 380V) air compressors from Shanghai Schneider Sunshine in 2013, which are mainly used for the general contracting of the company's railway projects.