Liuyang Shuangjia Fireworks Machinery Factory is a privately-owned enterprise specializing in the research, development, and production of automated CNC paper tube equipment. Covering an area of 3,000 square meters, the factory primarily manufactures inner and outer paper tube winding machines, Roman candle paper tube equipment, and more. In 2017, the fully mechanical "Three-Axis High-Speed Winding Machine" developed by the factory achieved a daily output 2 to 3 times that of traditional machines, significantly improving production efficiency and reducing costs. This product has been granted multiple national invention patent certificates and utility model patent certificates. It is sold both domestically and internationally and has received widespread recognition and consistent acclaim from customers.