Didn't Yang Yi say that she was a spy in military secrets? She also wrote the wrong name, and there was a code on a piece of paper. How did the ending rehabilitate Yang Yi?
Yang Yi is probably pregnant with a child in prison. A leader in the prison looked at her pitifully and lied to her that she had an important message for her to take to Sister Wu. In fact, there is no important information at all. Because this person and sister Wu like reading books, they use the first letter of the topic as a signal. Sister Wu didn't see it and said it wasn't information. Later, Zhang Gensheng solved the secret. It turned out that the man wanted to say: save the child.