In 1993, the company introduced the restor lubrication series developed in the united states and the mature automobile maintenance service model and philosophy of the united states. As the china regional general agent of restorer, yonsei has been operating successfully in china for nearly two decades and has been well received and trusted by a wide range of consumers. Some of the restor products, which were successfully used in the united states of america's apollo moon equipment, have been in the united states since the 1980s, in europe and the united states of america and on five continents, and have been extended to more than 20 countries worldwide and have opened over 300,000 shops. At present, the long-barrel high-tech products and the dynamic vehicle maintenance model have been applied in more than two dozen provinces and cities in the greater north of the country, resulting in the recovery and youth of thousands of motor engines and significant savings in fuel and maintenance costs. It has developed a well-known brand of the industry, which enjoys excellent reputations and high visibility. The product series has been validated by national and international automobile testing institutions and has become part of the training on qualification for energy-saving emission reduction and is now being used by industries. Yonbard is the logical dynamic maintenance model around the three elements of the engine, centred on the pressure of the cylinder; a humanistic, nuanced service model; a mature, well-developed and stable business model; and a general name for advertising promotion guidance, serialized products for engine maintenance. The "yonbard dynamic conservation model" was summed up after years of exploration and was developed in conjunction with a study of china's national situation. The conservation model combines the performance of long-barrel high-technology conservation products more organically and scientifically with different vehicle conditions and conservation processes. Yengbai has always maintained the conservation concept of "replacement" by dividing car maintenance into five main elements: machines, electricity, oil, water and gas, based on imitation of mechanical dynamic wear and tear repair, with gas tank pressure at its centre, improving and optimizing in many ways the five main elements of mechanical cars at all stages of the vehicle's life cycle, avoiding short-board effects, bringing the structure, performance and working state of the vehicle beyond design levels, achieving the healthy operation of mechanical cars throughout its life cycle and improving the economy, functionality and comfort of motor vehicles。