Strong Partnership, Building the Future Together: Oriental RainBow and Lianxin Casting Sand Establish a Joint Venture to Lead Industrial Upgrading.-LIANXIN SAND GROUP

Strong Partnership, Building the Future Together: Oriental RainBow and Lianxin Casting Sand Establish a Joint Venture to Lead Industrial Upgrading.

Release time:

2026-02-24

　　 Recently, Oriental Rainbow and Lianxin Casting & Sand Group officially established a joint venture named “Zhangwu Oriental Rainbow Lianxin New Materials Co., Ltd.” 。 This collaboration marks a shift from a long-term customer relationship to deep strategic synergy, aiming to jointly promote the green, efficient, and innovative development of the foundry-grade silica sand industry.

A photo of Li Weiguo from Oriental Rainbow (left) and Deng Yuhui, founder of Lianxin Casting Sand Group (right).

　　Oriental Rainbow as Global provider of building and construction material systems Its diverse product portfolio has obtained numerous internationally recognized certifications, including the EU CE mark and Germany’s EC1, and it has been listed on Fortune China’s Top 500 Chinese Listed Companies for many consecutive years. According to the latest market data, Oriental Rainbow has not only achieved... Waterproof coating has ranked first in national sales for 15 consecutive years. , further establishing “ No. 1 in global sales of architectural waterproofing materials (2024). its market position.

　　While deepening its focus on the core business of waterproofing, Oriental Rainbow’s diversification strategy has yielded remarkable results. In 2025, the mortar and dry-mix materials business achieved leapfrog growth, with total annual production and sales reaching... Exceeding 12 million tons, a significant increase of 50% over the previous year. The scale effect and market competitiveness have been further unleashed, continuously consolidating its leading position in the global construction and building materials sector.

　　 Lianxin Foundry Sand Group is a recognized industry leader in the field of foundry sand, with annual sales of 1.1 million tons of foundry sand and annual revenues of 680 million yuan. The company serves over 2,000 customers and boasts nationwide production facilities as well as a solid reputation for its technical expertise.
　　The joint venture will integrate the strengths of both parties, leveraging Lianxin Casting Sand’s deep-rooted expertise in the casting sand sector and combining it with Oriental RainBow’s extensive experience in system services. The focus will be on significantly enhancing the efficiency of silica sand resource extraction and improving the level of comprehensive utilization. This collaboration will drive a green and efficient transformation of mining processes and expand the applications of silica sand in new building materials, eco-friendly materials, and other emerging fields, fully unlocking the material’s value.
　　Innovation is a key focus of mutual interest for both parties. Oriental RainBow holds multiple patents in the building materials sector, while Lianxin Casting Sand continues to deepen its expertise in casting sand technology. After the joint venture is established, both parties will concentrate their resources on tackling key technologies such as silica sand purification, modified applications, and recycling processes, thereby promoting the advancement of industry technical standards and helping downstream enterprises reduce costs and improve efficiency.

　　In the realm of the circular economy, Lianxin Foundry Sand has successfully developed a casting sand regeneration technology with high recycling rates and has already achieved large-scale application. Following the establishment of the joint venture, the company will accelerate the nationwide rollout of this technology, reduce reliance on virgin sand, lower environmental impacts, and drive the industry toward a green and circular transformation.
　　 The establishment of Zhangwu Dongfang Yuhong Lianxin New Materials Co., Ltd. marks an important milestone in the Chinese casting sand industry’s transition toward intensification, high technology, and green practices. 。 Both parties will leverage the joint venture as a platform to continue investing in R&D and resource integration, jointly exploring applications of silica sand in high-end manufacturing and green building sectors, thereby providing support for the high-quality development of China’s casting industry.
　　This collaboration not only strengthens the strategic positioning of both companies but also drives the upgrading of the entire industrial chain, helping China’s casting industry move toward becoming a global powerhouse and achieving a win-win outcome in terms of economic and environmental benefits.

　　Notice: With the approval of the market regulatory authority, effective January 14, 2026, the former “Zhangwu County Lianxin Casting Silica Sand Co., Ltd.” will officially be renamed “Zhangwu Dongfang Yuhong Lianxin New Materials Co., Ltd.” We would like to inform you of the following relevant matters: This name change will not affect our company’s business scope, operating entity, contractual obligations, or legal liabilities. All contracts, agreements, and other legal documents signed with our company will remain valid, and the terms, rights, and obligations set forth therein will remain unchanged. For more details, please refer to the “Company Name Change Notification Letter.”