Shanghai Ganjian Machinery Co., Ltd.'s subsidiary "Bonaisi" was established in 2011, adhering to the business philosophy of manufacturing energy-saving, low-carbon, and intelligent oil-free air compressors. Through continuous research and development, design, service, and solid foundation in aerodynamic application technology, it launched laboratory/medical series oil-free air compressors in 2011, oil-free and waterless silent air compressors in 2013, box type ultra quiet oil-free air compressors (45 decibels) in 2015, oil-free vortex air compressors in 2017, oil-free screw air compressors in 2019, integrated ultra quiet oil-free and waterless air compressors in 2020, medical gas compressors in 2021, and dry oil-free screw air compressors in 2023.