However, the early doors and windows in ancient times were particularly limited by technology. In addition to maintaining the basic functions of doors and windows, they added functions such as partitions and anti-theft. Large families used doors and windows to improve the grade of doors and windows by carving patterns.

It was not until the Republic of my country period that steel structure doors and windows began to be introduced into China, mainly from Britain, Belgium, and Japan. In 1925, our country began to produce them in small batches. Steel structure doors and windows began to enhance the durability and firmness of doors and windows. But most families are wooden structures.

It was not until the 1970s that my country began to accept aluminum alloy structure door and window systems. Aluminum alloy doors and windows are light, high-strength, not easy to deform, and have more diverse designs. Air tightness, sound insulation, corrosion resistance, waterproofness, and wind resistance have been comprehensively improved. However, due to technical limitations, the overall quality of aluminum alloy doors and windows on the market is still uneven.

It was not until the 1980s that domestic modern buildings began to introduce high-performance system doors and windows from Europe.

System doors and windows are a perfect combination of door and window performance systems. They have a series of important functions such as water tightness, air tightness, wind resistance, degree, heat insulation, sound insulation, anti-theft, sunshade, weather resistance, and operating feel that are higher than the requirements of ordinary doors and windows. They also need to consider the comprehensive results of the performance of each link of equipment, profiles, accessories, glass, adhesives, and seals. It is a high-performance door and window complex.