1. Conch (a high-tech enterprise, a new chemical building materials enterprise invested and controlled by China Anhui Conch Group, top ten plastic steel door brands, Wuhu Conch Profile Technology Co., Ltd.)

2. Shide (a well-known trademark in China, one of the largest chemical building materials production bases in the world, top 5 Chinese enterprises, top ten plastic steel doors brands, Dalian Shide Group Co., Ltd.)

3. Beixin (founded in 1979, a well-known trademark in China, a famous brand in China, a listed company, and one of the largest new building materials industry groups in China, Beixin Group Building Materials Co., Ltd.)

4. Vicat (the first high-grade PVC-U plastic profile production base invested and built by German Vicat Group, the top ten brands of plastic steel doors, Germany Vicat Plastics (Shanghai) Co., Ltd.)

5. Zhongcai (a brand of Zhejiang Zhongcai Investment Group, a national key high-tech enterprise, one of the top ten plastic steel door brands, a famous brand in the industry, Zhejiang Zhongcai Profile Co., Ltd.)

6. New World Plastic Window (one of the large manufacturers of UPVC plastic window profiles and plastic steel doors and windows designated by the Ministry of Construction, Anshan New World Plastic Window Building Materials Co., Ltd.)

7. Swan Profile (founded in 2, the company passed: ISO91 international quality management system certification, ISO141 international environmental management system certification, and GB/T281 international occupational health and safety management system certification. And has won

: national inspection-free products, famous trademarks of Henan Province, high-quality products of Henan Province, famous brand products of Henan Province, contract-abiding and credit-abiding enterprises of Henan Province, members of China Quality Inspection Association and members of china construction metal structure association. )

8. Feng Aluminum (China famous trademark, China famous brand product, Guangdong famous trademark, Guangdong famous brand product, Guangdong high-tech enterprise, Guangdong Feng Aluminum Co., Ltd.)

9. Ke Meiling (in 1897, Germany, a leading brand in the international profile field, a large multinational enterprise, top ten brands of plastic steel doors, Ke Meiling (Tianjin) Polymer Profile Co., Ltd.).