What kind of mood am I in sailing on a summer night?

The mountains are undulating, the ships are sailing at high speed, and the mountains are light black. The mountains are very much like the backs of "passionate" and "iron" green behemoths, which write about the speed of the boat and the eagerness to see the play. It shows "I"' s love for the beautiful scenery of the water towns in the south of the Yangtze River, naive childlike interest and joy after the realization of the desire to watch social dramas, and further shows the author's thoughts and feelings of loving the countryside and working people and yearning for a better and free life.