OYH has nearly three decades of expertise in building materials industry, providing comprehensive solutions for major infrastructure projects, industrial buildings, and residential and commercial constructions worldwide. 

With a core focus on Waterproofing and Mortar Technologies, the group has expanded across both upstream and downstream sectors, establishing an integrated building materials service system that includes multiple business segments such as building waterproofing, non-woven fabrics, architectural coatings, building renovation, energy-efficient insulation, specialty membranes, mortar and powder-based products, and chemical raw materials.