In October 2017, Hongda Hi-Tech Holdings Co., Ltd. received the “Invention Patent Certificate” issued by the State Intellectual Property Office of the People's Republic of China.

This invention patent mainly discloses a preparation method of a stretched gradient warp knitting material. The warp-knitted material prepared by using the patent exhibits a color different from the unstretched state under the condition of tensile force, and the difference in the force exerts a different color depth. The warp knitting material is mainly used in the field of sportswear. The sportswear made of this material will intuitively reflect the force of various parts of the body in the movement with the color change of the surface material, so that the sports people can test their own sports effects. Thereby fully demonstrating the body line and power beauty after exercise.

The invention patents have fully cut into the development trend of the national fitness in today's society. It is a key measure for Hongda to further expand the field of sportswear fabrics, and has a positive effect on the company's innovative development in sportswear. The acquisition of new patents is conducive to the company to further improve the intellectual property protection system, give play to the advantages of the company's independent intellectual property rights, and enhance the company's core competitiveness and market competitiveness of warp knitted fabric products.