What thoughts and feelings are expressed in the ancient poems of grade one to grade six published by People's Education Press?

The first article is "Returning to Defend", written by Cao Cao. It is the last chapter in the four chapters of Cao Cao's Yuefu poetry collection "Walking Out of Xiamen". The poems sung through the ages are old, and they aim for thousands of miles. The second is Meng Haoran, a poet in the Tang Dynasty. The whole poem selected from Meng Xiangyang's Collected Works is full of interest in returning to nature. The third is Chang Jian, a poet in the Tang Dynasty. The fourth is Li Bai, a poet in the Tang Dynasty. The fifth is the Tang Dynasty poet Li Shangyin. The yearning for friends and the strong desire for reunion in a foreign land ranked sixth. Poetry leads to discussion by narration, but the discussion does not point to the singer, but to the upper class who only cares about their own enjoyment regardless of national difficulties. The seventh article "Huanxisha" was written by Yan Shu, a politician and writer in the Northern Song Dynasty. The eighth article, Cooking and Painting Shop in the Song and Yuan Dynasties, was written by Yang Wanli, a poet in the Song Dynasty. Main idea: I have overcome one difficulty in my study and ushered in another. Therefore, I shouldn't be intoxicated with temporary success and be complacent. We should fully estimate the difficulties and obstacles on the road ahead. Make the spirit come true. The ninth chapter "Dream Preface" was written by Li Qingzhao, a poetess in the Song Dynasty. The tenth chapter "Reading Experience" was written by Zhu, a philosopher, educator and writer in the Southern Song Dynasty. The implication is that people should have a clear mind, study hard and always add new knowledge.