What do you mean the assistant is not green?

What do you mean non-green? Unaccompanied children take entrance exams. According to Zhihu's inquiry, non-green means that no accompanying children take the college entrance examination. Green now means that their partner is cheating. The implication is that one party is having an affair with others, and the other party is said to be cuckolded. Being cuckolded is a very disgraceful, shameful and humiliating thing.