dog and pony show
为公共关系或推销等目的而安排的缺乏实质内容的“盛大表演”。
a presentation that has no substance and is just a shallow demonstration, entertainment, or "show" usually done by a corporation or business to bring attention to itself or one of its products.
EXAMPLE:
"The new e-commerce company put on a dog and pony show for potential investors."