What do the last two sentences express the author's feelings?

Before leaving, "advise you to drink more wine" is like a cup of rich emotional nectar, which has soaked all the rich and profound friendship of the poet. There are feelings of parting, deep consideration of the traveler's situation and mood, and cordial wishes for cherishing the road ahead. For the farewell party, persuading the other party to "have more drinks" is not only to let friends take away more friendship, but also to delay the breakup intentionally or unintentionally and let the other party stay for a moment. Does the feeling of "going out of Xiyangguan for no reason" belong only to walkers? Parting, I have a lot to say, but I don't know where to start at the moment. On this occasion, there is often silence. "Advise you to drink more wine" is a way to unconsciously break this silence and express the rich and complicated feelings at the moment. What the poet has not said is much richer than what he has said. In short, although three or four sentences are only moments, they are extremely rich moments.