In door and window design, French doors, with their romantic charm and practical functions, serve as a "poetic bridge" connecting indoor and outdoor spaces. They are not just doors, but more like openable and closable picture frames—bringing the greenery of the courtyard and the starry sky of the terrace into the room, while allowing the warmth of the living room and the tranquility of the study to permeate the outdoors. Choosing French doors is not only a functional consideration but also an expression of lifestyle.