There is such a detail. Fukuhara Ai mentioned it when he called Kawasaki to report the situation. Narita sent a secretary to the Security Bureau to check the telephone number after Tang Fei was detained. Because of this, Kawakami Katsuichi misjudged Narita and panicked himself, which further confirmed Tang Fei's confession. So it is very likely that Narita did not ask the secretary to go to the Security Bureau to inquire about the situation many times, but what about the secretary? Self-assertion? , deliberately to the security bureau, increased the suspicion of narita.
So why did Tang Fei confess that he was Narita? Is it because they have a good relationship and acquaintances are easy to bully? Of course not. Narita's role is very important. Tang Fei and Narita's secretary dragged Narita into the water, which is of great benefit to the future situation. He Lin as? Bridge head? Experienced narita poses a great threat, so it is imperative to take this opportunity to get rid of narita.
According to my estimation, Mu Danwula's plan is to let Tang Fei lurk as Wajim again after being exposed, and then double spy, so that the enemy will be suspicious of each other. I'm afraid it's been a long time since Fukuhara Ai brought Narita down. The role of secretary Narita cannot be ignored. He has become the first-class merit of Fukuhara Ai and Kawasaki. This should also be the first step of Mudan Lula's plan.
Tang Fei lurks a new identity, which is the beginning of the wonderful plot of "The Chance of Winning". In the following story, Narita committed suicide suddenly after being attacked by Fukuhara Ai and others. In my opinion, this is not evidence of Narita's undercover, but Narita's covert operation. Narita mistakenly thought that Fukuhara Ai and others had discovered their own secret actions, and decided to leave on their own in order not to expose the secret actions they participated in.