Compare Shu Fen and Shu Xiang, and talk about their differences in praising Zhuge Liang's achievements, expressing personal feelings and expressing techniques.

1, praising achievements: the book focuses on praising Zhuge Liang's loyalty and loneliness with unpaid ambitions; Book of wrath pays attention to Zhuge Liang's northern expedition, especially the strong desire for northern expedition shown in the model.

2. Lyricism: The book of letters mainly shows the loyalty of "dying without conquering", the unfulfilled ambition, the hero's regret, and the "frequent three strands" and "opening up the economy in the two dynasties"; By praising Zhuge Liang's achievements in the Northern Expedition, Book of Wrath reflects his frustration and sadness that he could not recover lost land and his desire to recover occupied rivers and mountains. Because of the different living environments of the two authors, Du Fu was displaced from place to place in the Anshi Rebellion, so he hoped that a loyal minister like Zhuge Liang could reorganize the rivers and mountains, while Lu You did not think about the resentment and helplessness of serving the country brought about by the Northern Expedition because of his partiality in the Southern Song Dynasty.

3. Expression technique: Shuxiang expresses her feelings through the scenery; "book anger" is a metaphor for the present.