How to treat the spy played by Li Naiwen in the film above the cliff?

In the film Above the Cliff, Li Naiwen plays an excellent spy with superb acting skills.

On the Cliff, Li Naiwen's Lu Ming is definitely an underrated one. Lu Ming, played by Li Naiwen, is the smartest professional spy. With subtle observation, I guessed who the agent was, and my eyes changed quickly. This man doesn't seem to have much promise, so he knows to mix behind the section chief and the section chief, let him do whatever he wants, sometimes laugh and laugh, and he doesn't talk much when it's critical, so he can eat whatever he wants and drink whatever he wants. But, actually, he's a thief. On the train, after Zhu Yawen saw Liu Haocun, he could see all the worries and anxieties. Later, in the big house, everyone drank together, and he also turned to Zhu Yawen and Amanda's words. However, he immediately stopped making fun after feeling Amanda's wariness. Also, when he passed out, he was hit hard by Yu Hewei.

Everyone thought he was really asleep, but look at his later conversation with Feifan. He said: Zhou Yi told you that I drank the wrong wine myself? It is obvious that he knows that the wine has been changed. In fact, at this time, he already suspected Zhou Yi. Later, when Amanda went to the embassy, he realized that the two men might run away. So, just ask to follow in. Finally, Amanda ran away and Zhang Xianchen, played by Zhang Yi, was shot. He almost completely confirmed the identity of Zhou Yi. However, it is a suspense whether he reported Zhou Yi to the section chief.

it's possible that he didn't say anything in order not to cause trouble and do nothing. It is also possible that he has already said it, but the section chief wants to close the case as soon as possible, so he can only pretend to be in the dark. In short, look at his expression, it is very unwilling. If you don't say that director Zhang Yimou will pick actors, none of the old actors used this time have fallen off the chain, even a small supporting role, and the characters are very distinctive. The secret service guys, whether they are section chief Dahong Ni and section chief Yu Hewei, or Li Naiwen and little unlucky Yu Ailei, are very promising. I like this role.