A well-known brand of plastic steel doors and windows, a famous brand product in Heilongjiang Province, a modern enterprise specializing in the production of PVC-U plastic profiles and steel linings, and the processing of various special-shaped plastic windows

Harbin Zhongda Materials Technology Co., Ltd. is one of the earliest collectively listed enterprises in the National Small and Medium-sized Enterprises Share Transfer System (New Third Board) in China, stock name: Zhongda Technology, stock code: 430538. It is a state-level high-tech enterprise, an executive director unit of China Construction Metal Structure Association, a vice chairman unit and a designated production enterprise of the Plastic Doors and Windows Committee of China Construction Metal Structure Association, and a vice chairman unit and designated production enterprise of the Professional Committee of Profiles and Doors and Windows Products of China Plastics Processing Industry Association. In the same industry, it took the lead in establishing Harbin Zhongda Plastic Doors and Windows Research Institute and PVC Profile R&D Center, and it is the eternal purpose of Zhongda Company to guide production with scientific research.

Harbin Medium and Large Material Technology Co., Ltd. covers an area of 55,000 square meters and is an enterprise specializing in the production of PVC-U plastic profiles. It has an internationally advanced twin-screw profile extrusion production line. It can produce 60, 66, 70 and 80 series casement door and window profiles. 60, 75, 80, 88 series sliding door and window profiles, with an annual production capacity of 150,000 tons. The plastic profiles produced have been rated as "Harbin Famous Brand", "Heilongjiang Famous Brand" and "Heilongjiang Province Inspection-free Products" for many times, and have passed the GB/T19001-2008-ISO9001:2008 international quality management system certification, the product quality сг68 certification of the Russian State Committee of Metrology and Standards, and the SC06 certification 266497 of the Russian National Product Hygiene Inspection. In order to meet the needs of different levels of society, the 66 four-cavity three-glass and three-sealing profile products developed by the Zhongda Plastic Doors and Windows Research Institute in 2002 were listed as the scientific and technological achievements promotion project of the Ministry of Construction and the "four new" products of the Ministry of Construction.

Harbin Medium and Large Material Technology Co., Ltd., in addition to the production of PVC plastic profiles, also supports the production of steel lining, processing of various special-shaped plastic windows. It is always the highest pursuit of CUHK to produce "high-quality, high-tech" patented products that are constantly updated and to create maximum value services for customers.