Dongying Yiheng New Building Materials Co., Ltd. is a state-certified high-tech enterprise specializing in the R&D, production, and sales of energy-efficient steel-plastic/aluminum-plastic co-extrusion door/window profiles, energy-saving doors/windows, and fluorocarbon coating. The company is located in the Guangrao Economic Development Zone.

As China's pioneer in the field, Yiheng introduced complete sets of production equipment and technology from Germany to manufacture a new generation of low-carbon, energy-efficient door/window profiles. Building on the assimilation of advanced international expertise, our technical team independently developed the cost-effective steel(aluminum)-plastic co-extrusion profile series. These profiles overcome the drawbacks of conventional PVC doors/windows-such as low wind resistance, poor weather resistance, and potential quality compromises during the post-installation of steel inserts-making them a key eco-friendly construction material promoted by the Ministry of Housing and Urban-Rural Development.

Embracing market trends with strong competitive advantages, Yiheng operates with high standards from the outset. Our team comprises seasoned professionals from China's plastic molding industry, whose extensive expertise drives Yiheng's growth. The company operates 25 advanced co-extrusion lines and 5 non-co-extrusion lines from Germany, supported by raw material mixing systems and over 120 sets of molds across seven profile series. With fixed assets exceeding CNY 120 million, our annual production capacity exceeds 60, 000 tons of premium steel-plastic/aluminum-plastic co-extruded profiles.

Yiheng profiles integrate Germany's advanced production technology and standards with domestic expertise in steel(aluminum)-plastic co-extrusion, forming a mature, patented technical system. Our process seamlessly fuses steel/aluminum inserts with plastic profiles, combining the high strength of metal with the thermal insulation and noise reduction of plastics. This "steel-plastic co-extrusion" technology represents the global trend in window innovation and has been designated:

A "National Technology Innovation Project" by the State Economic and Trade Commission;

A key initiative in the *National Chemical Building Materials Promotion Plan (9th Five-Year Plan and 2010 Development Outline)*;

Supported by government policies and favored by real estate developers.

The L11SJ610 Standard Design Atlas for Series 1 Energy-Saving Steel(Aluminum)-Plastic Co-Extrusion Doors/Windows, co-developed with Shandong Provincial Standardization Office, was officially published on May 1, 2016.

As premium materials for high-end doors/windows, Yiheng's co-extruded profiles meet market demands with superior quality and competitive pricing. All profiles pass national quality testing, and finished products are certified by the Shandong Construction Machinery Quality Inspection Center.

Yiheng's domestic market spans from Shandong to Beijing, Inner Mongolia, Shanxi, Shaanxi, Jiangsu, Fujian, and Guangdong, with exports to Malaysia, Laos, Vietnam, and beyond. Our global footprint continues to expand, reflecting promising growth prospects.

Guided by the philosophy of "Exclusive Focus, Long-Term Development", we uphold the principles of "Respecting Nature, Valuing People, Integrity, Mutual Benefit, and Environmental Conservation". Through "Pragmatism, Collaboration, Innovation, and Excellence", we strive to deliver industry-leading products and services, placing "Customer First" at the core of our operations.