Riyuetan is Taiwan's business card. When I was a child, I read it in primary school textbooks, and I yearned for it very much. Sun Moon Lake is also a must-see tourist attraction to Taiwan, but after going there, I feel that Sun Moon Lake is too small, especially Yuetan. It feels like a lake. The lake is green and transparent. Under the cover of the blue sky, the waves are sparkling. Yachts are like sailing on a green mirror. They are very beautiful.