Wu Gou is a hook knife made by Wu Di. There is a line in Du Fu's poem "After Dyke": "Teenagers have no gifts, but look at Wu Gou with a smile". Wu Gou, who should have killed the enemy on the battlefield, now idles around just for pleasure, which shows that although the author has the ambition to make contributions on the battlefield, he is a hero with no place to play.

Wang Songbizhi's Notes on Swallows in Lushui recorded that Liu Mengjie, who was "at odds with the world", often stood still by the railing, thinking about the world, whispering alone or patting the railing with his hand. I once wrote a poem saying, "After studying for forty years, I was drunk several times." Patting the railing is full of unspeakable depression and depression, and it is vented by patting the railing. Used here, the author's eagerness and anger of nowhere to display his ambition are presented to the readers.

Hans Zhang () was a Jin Dynasty official in Luoyang. Seeing the autumn wind, he thought of the delicious bass in Suzhou, his hometown, so he abandoned his official position and returned to his hometown. (See the Book of Jin. Hans Zhang Chuan) Now that the late autumn season is coming again, even the geese know to chase and fly back to their hometown, not to mention me, a wanderer in the south of the Yangtze River? However, his hometown is still under the rule of the Jin people, but the court of the Southern Song Dynasty is selfish, so it is difficult to talk about returning home!

The important thing is to buy land and a house. Liu Lang refers to Liu Bei in the Three Kingdoms period, and generally refers to people with lofty aspirations. During the Three Kingdoms period, Xu Yunfeng visited Chen Deng, who was very cold to him. He sleeps alone in the big bed and wakes him up. Xu Li went to ask Liu Bei, and Liu Bei said: The world is in chaos. You forget the affairs of state and ask for land and home. Chen Deng certainly looks down on you.

"Shi Shuo Xin Yu Yan" records Huan Wen's Northern Expedition. When passing through Jincheng, I saw that the willow I planted in that year had grown to a few yards thick, and sighed: "How can people be inferior when the wood is like this?" Trees are so tall, how can people not be the boss!