How to say, we arrived at 3:30 pm, missed the last cruise, forced to take the ferry to drive more than ten kilometers to the river to see the rock painting. The scenery along the way was good, but it began to rain. When we arrived at the other side of the rock painting, everything was misty and rainy. It happened that the boat we missed was also there. The sound of the tour guide's explanation was quite loud on the other side of the river. I heard it clearly, but the content didn't understand. So finally understood that even if we catch up with the cruise ship, look at the rock paintings face-to-face up close, plus the tour guide explanation, it should still not be understood, too abstract, really rely on imagination.