The company was founded in 1965. It is the vice-chairman unit of the National Oil Pump Nozzle Industry, one of the technical standard setting units for the national oil pump nozzle industry, and a provincial enterprise technology development center. The oil pump nozzle is a famous brand product in Shandong Province, and the "Yazi" brand is a famous trademark in Shandong Province. It has passed the ISO/TS16949 quality system certification. The production and sales volume of its leading products, single-cylinder fuel injection pumps, multi-cylinder fuel injection pumps, fuel injectors and three pairs of precision parts, rank among the top in the same industry nationwide. Among them, the production and sales volume of single-cylinder fuel injection pump assembly and fuel injector assembly have ranked first in the country for nine consecutive years. Ranked first in the industry, with a market share of over 50%. In order to speed up the development of the enterprise, the company regards green, environmentally friendly and energy-saving vehicle multi-cylinder fuel injection pumps as the focus of medium and long-term development, and has successively developed a series of products that meet the emission requirements of Euro I, Euro II and Euro III. In particular, the market launch of high-pressure rail systems, electronically controlled unit combination pumps and gasoline electric nozzles has injected new vitality into the development of the company.