Who is the grasshopper on TV?

Zhang Bei is a grasshopper. According to relevant information, in the 27th episode of the TV series "Surprise", Director Li claimed that he intercepted the news of the evil shadow radio station and activated another agent code-named "Grasshopper". Cui has a certain understanding of "grasshopper" and knows that this person is Zhang Bei, a senior Japanese spy. According to Lu Kai, "grasshopper" has many origins, but I don't know why it took part in the action.