1, double. Window to door, including berthing, Xiling to Soochow, Qian Qiu to Wan Li, and snow to the boat. "The window contains thousands of autumn snows in Xiling" is very neat for "Wan Li ships moored in Wu Dong".
2. Intertextuality. Intertextuality is also called intertextuality, mutual words, mutual meaning, mutual knowledge, mutual preparation, mutual reference, intertextuality and mutual preparation. It means that in a coherent sentence, some words complement each other according to the contextual conditions to express a complete meaning together, or omit the words that appear below from above, omit the words that appear above from below, write into each other and combine them to see the meaning. At the same time, the window contains Xiling snow, and the window also berths Dongwu Wan Li ship; Similarly, when the Wu Dong Wan Li ship was moored at the door, it also contained the snow in Xiling. They are not isolated from each other, but intertwined with each other to form a complete and unified picture.