1. The main frame is made of high-strength die castings, which is beautiful in shape, has the characteristics of high strength and light weight. The surface is sprayed and has anti-aging/corrosion characteristics. 2. The foldable frame has a foldable backrest tube for easy carrying and saving space. 3. The seat cushion/back cushion is sewn and formed with high-strength mesh fabric. It is soft, breathable and non-slip, smooth and beautiful. It has a built-in middle interlayer canvas for reinforcement. High tensile strength (the overall tensile strength of the seat cushion is as high as 5000N). 4. The front wear-resistant 9-inch rechargeable pneumatic tires, shock-absorbing springs, and the universal front wheels are equipped with plastic front wheel forks, which is beautiful in appearance.