Bo da jing shen is a traditional Chinese four-character idiom used for centuries to describe learning, culture or thought that is both broad in scope and deep in substance, most famously applied to Chinese culture itself. As a one-second soundboard clip, only the spoken phrase remains, stripped of any lecture or context. Online it spread as a short reaction sound among Chinese-speaking users and meme editors, who reuse the formal praise in informal situations to create contrast between the grand wording and a trivial moment.