Narrow-gauge railway lines built by the government to develop remote areas (see chart below) have become one of the best-preserved steam train lines in the world today thanks to the tireless efforts of volunteers. The railway is 29 kilometers long. It travels through wooden trestles tens of meters high and shuttles through picturesque mountains and forests. After more than an hour's drive, it can reach the Jade Lake. I am impressed by the warm smile of the crew, which is an expression of pride and self-confidence that can be emitted from the heart no matter what work they do. Pro, professional enough!