Some buildings in Wo Che Estate (禾輋邨) feature a unique "回" (square-shaped) design, rare among 1970s public housing. This layout centers around a central corridor, with units surrounding it, enhancing ventilation, lighting, and neighborly interaction. The design reflects the innovative public housing concepts of the time and fosters a strong community spirit, making it a distinctive feature of the estate and a nostalgic reminder of life in old Hong Kong.