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Rainbow has won a good reputation in the venting industry and is strongly recommended by numerous electromechanical consultants and design institutes. Following the principle of building a worldly-famous brand with highly professional products, Rainbow keeps working with first-class design institutes, universities, and enterprises both home and abroad to improve its R&D ability. Collaborating with Southeast University, Wuhan University of technology, Soochow University and Sichuan University (a major research institution for national flue gas engineering), Rainbow has established with them a national research center for urban gas purification, a doctoral research center, and a chimney control technology center respectively. It also reaches a strategic partnership with MORSO, well-known Danish stove manufacturer and FERBECK, a French steel chimney company. Rainbow obtains 66 national patents, many of which are invention patents. It has a dozen of certified systems, such as the ISO9001: 2015 quality system certification and ISO14001: 2015 environmental system certification.

Rainbow pays great efforts to the development of system core technology. It is the Joist Research Center of New Composite Chimney and Construction, Engineering Research Center of National Flue Gas Desulfurization Technology, Engineering Research Center of Urban Flue Gas Cleaning Technology, Research Center of Chimney Control Technology, Technology Center of Chimney Control, Research and Develop Center of Provincial Technical Project and Testing Center of Flue Gas. The chimney parts, brackets and compensation devices developed by Rainbow have been applied to many landmark chimneys. Moreover, Rainbow is also the chief editor of Technical Specification for Factory-Made Double Stainless Steel Flues and Chimneys CECS415: 2015.
Rainbow undertook the pipeline construction of many famous projects in China, including 65% of the Beijing Olympic Games, 75% of the Shanghai World Expo, 85% of Lu Jia Zui Financial District, and 100% of the Nanjing youth Olympic Games.
Rainbow is also well-famed in the international market. Its products have been exported to more than 20 countries, such as the United States, Germany, Japan, Korea, Italy, the Netherlands, Denmark, Thailand and South Africa. Doha International Airport, Spanish City Square, South African Boiler Island and Hong Kong Municipal Engineering undertaken by Rainbow are widely recognized in the market.

A professional chimney manufacturer enjoying good reputation both home and abroad
An enterprise equipped with testing devices rival those of TUV Lab;
An enterprise whose products are listed to CE, UL and ULC certification;
A member of CICIND;
An enterprise with chimney installation qualification and safety production license;
A national high-tech enterprise;
Rainbow is dedicated to providing its partners qualified products and technologies guaranteed by scale production, standardized core spare parts and normalized manufacturing process.