Bison Finance Group Ltd. is an investment company, which engages in the provision of advertising management services. It provides media sales and management and administrative services for Multi-media On-board, transit vehicle exteriors and interiors, online portal and mobile apps, shelters, and outdoor signages advertising businesses. The firm operates through the Hong Kong and Mainland China geographical segments. The Hong Kong segment engages in the provision of media sales, design, and management services and production of advertisements. The Mainland China segment offers media sales services and production of advertisements. The company was founded by Winnie J. Ng on December 8, 2000 and is headquartered in Hong Kong.