Rongzun International Holdings Group Limited is an investment holding company that provides alteration and addition works in Hong Kong. Its services include building layout and structural works, such as designing new structural works, fitting out, and changing facilities configurations, as well as constructing new extensions to existing buildings and converting existing buildings to different types. The company also engages in civil engineering works, including site formation and foundation works, and offers administrative, information and transmission, software, and information technology services. Formerly known as B & D Strategic Holdings Limited, it changed its name to Rongzun International Holdings Group Limited in April 2024. Founded in 1995, it is headquartered in Kwai Chung, Hong Kong.