Shandong Liancheng (Stock Code: 002921) is a high-tech enterprise established in 1995, one of the top 100 foundry enterprises in China, which specializes in the design, development, production and manufacturing of automotive parts, air conditioning compressors, hydraulic engineering machinery, agricultural machinery and other related parts. It has 10 world-leading modern casting production lines and more than 500 imported mechanical processing equipment, with an annual casting production capacity of 120,000 tons and an annual output of approximately 8 million parts of various types. The products are mainly sold to developed countries and regions such as the United States, Europe, Japan. While, it also supplies products to well-known manufacturers such as GM, Ford, Honda, Toyota, China National Heavy Duty Truck, and Weichai Power, with sales of nearly one billion yuan.

ARM/QSE is a well-known sanitation vehicle production company in America. It mainly produces sanitation vehicles, snowplows, salt spreaders, cleaning trucks, etc., and provides systematic management services for urban cleaning.

ARM/QSE is a well-known sanitation vehicle production company in America. It mainly produces sanitation vehicles, snowplows, salt spreaders, cleaning trucks, etc., and provides systematic management services for urban cleaning.

RCM was established in 1970. It specializes in the design, sales and manufacturing of cleaning equipment. It has advanced technology, excellent quality, good service, and has been recognized by customers. It is the second largest cleaning machinery manufacturer in the world.

Marco was founded in 1991, with more than 20 years of experience in heavy-duty steel structures, precision steel structures, cleaning equipment manufacturing and manufactures products for major international brands. Inheriting Macro's advanced technology and relying on RCM's large international organization, it has quickly become a leading manufacturer of heavy-duty industrial and street sweepers.