Nanjing Kangni Mechanical & Electrical Co.,Ltd engages in the research and development, manufacture, sale, and maintenance of railway vehicle door systems in China. The company offers mass transit vehicle doors, including electrically driven bi-parting and single-leaf sliding plug, electrically driven bi-parting external tightness and pocket sliding, manual pocket sliding, hinged, manual sliding plug, and external emergency front doors, as well as upturned hinged emergency front door/emergency stairs and rear end doors for cabs. It also provides main line vehicle doors, such as electrically controlled pneumatically driven pocket sliding and sliding plug, electrically controlled electrically driven sliding plug and sliding, manually operated sliding plug, manual operated hinged/sliding, inflatable sealing sliding plug, and manual sliding door/manually operated hinged door/manually operated swing doors. In addition, the company offers platform screen doors comprising full and half-height platform screen door systems for railway stations; and vehicle interior fittings that include partition of VIP rooms, central ceilings/ventilation grids, longitudinal transoms, partition walls/electrical cubicle covers of cab, side walls/side ceilings, side windows, and handrails and screens, as well as bus doors.