What is meant by a 黄信号 condition? It's in the context of the economic recovery of several industries.
Thanks in advance, everyone!
ETA: I know the literal meaning, just wondering if there's an idiom attached to it. Thanks!
ETA2: Turns out it's an economic saying, not a Japanese one, like some of you said. We went over it in class today and the native Japanese students were just as baffled as I was.