The npcc focuses on fuel-for-car maintenance and provides more comprehensive vehicle maintenance services to clients. The eu provides a wide range of union investors with complete information about the national oil exchange centre, including the union's advantages, membership terms, membership processes, etc. The national oil chaining centre (edlad (beijing) technology co. Ltd.) developed the oil exchange maintenance project in 2013. National chain-to-car exchange centre, designed for vehicle-to-car-to-car-for-car maintenance, is quickly maintained. It is able to provide a full range of guidance to union stores and a millions of kilometres of unrepaired maintenance for the car-loved community. The national oil chaining centre promotes the concept of "three-part, seven-score" to provide for replacement, for vehicle fuel exchange maintenance, and for rapid maintenance of the designed vehicle maintenance chain. Having state-of-the-art technology, top quality products, specialized teams, integrated national chain management, high-quality services, based on a strong technological platform and a unique business system, can provide full guidance to union stores, provide millions of kilometres of unrepaired maintenance to the car-lover community and produce high-quality products with advanced technology。