C538 What's the use of it?

On the way downstairs, Nan Lin asked me, "What's the use of this?!"

I replied, "I'll tell you about it later."

Passing by the guard, I told Nan Lin to send a cigarette to the old man. The old man was very happy and told us that he welcomed us to come next time.

Nan Lin asked again, "You're doing this? A visit? It's useless! "

I asked