Little is documented about the original recording behind Yang Guang, and the clip circulates mainly as a short, user-shared soundboard snippet rather than as an identified line from a film, song or television show. Its title uses the Chinese characters for sunshine, which gives it an instantly warm association even for listeners who do not speak the language. That simple, positive association helps explain its online life: creators reach for it as a compact mood cue in memes and short-form edits, where a half-second flash of brightness can land a joke or soften a transition without needing any context.