What are the ancient poems of Water Margin?

There are three songs sung by wine pickers in the Water Margin. The first song was sung by Lu, a wine picker I met in Wutai Mountain. The second song was sung by Qiu Xiaoyi. The third song was sung by Bai Sheng, the Rat, when Chao Gai and other seven people robbed the birthday class: "The scorching sun is like fire, and the wild Tian He rice is half burnt. The farmer's heart is like soup, and the son Wang Sun shakes it. "