BII Railway Transportation Technology Holdings Company Limited, formerly China City Railway Transportation Technology Holdings Company Limited, is an investment holding company principally engaged in the design, implementation, sale and maintenance of application solutions for the networking and controlling systems. The Company operates its business through five segments. The Design and Implementation segment is engaged in the provision of design and implementation of application solution services. The Maintenance segment is engaged in the provision of application solution maintenance services. The Software segment is engaged in the design and sale of application solution software. The Hardware and Spare Parts segment is engaged in the sales of application solution related hardware and spare parts. The Rental Income segment is engaged in the leasing of civil communication transmission systems.