The expression of Zhongzhou culture in Tang poetry mainly includes the following aspects:
1. **Zhongzhou politics**: There are many works in Tang poetry that describe the political life of Zhongzhou. For example, Bai Juyi's "Zhongzhou Yin" expresses his opinions and emotions on Zhongzhou politics.
2. **Imperial Examination**: The imperial examination system was prevalent in the Tang Dynasty, and many poets entered official careers through the imperial examination. Therefore, the imperial examination became an important theme in Tang poetry. For example, Du Fu's "Recalling the Past" describes the imperial examination situation in the prosperous period of Kaiyuan.
3. **Military**: The Tang Dynasty had a strong military. Some poets experienced wars and left works with military themes in Tang poetry. For example, Wang Zhihuan's "Liangzhou Ci" depicts war scenes on the frontier.
4. **Agriculture**: Since the Tang Dynasty implemented a self-sufficient economic policy, agriculture became the main industry. Many poets have described the hard life of farmers. For example, Liu Yuxi's "Song of Planting in the Field" vividly describes the scene of farmers planting rice.
5. **Food**: There were many kinds of food in the Tang Dynasty, and poets also had unique feelings about food. For example, Bai Juyi's "Lychee Picture Preface" vividly depicts the deliciousness of lychees.
6. **Wine**: The winemaking industry was developed in the Tang Dynasty, and poets often included wine in their poems. For example, Li Bai's "The Wine Will Come in" is a masterpiece that praises fine wine.
7. **Famous Places**: There were many places of interest in Zhongzhou during the Tang Dynasty, and many poets described these places of interest in their poems. For example, Du Fu's "Ascend the High" describes the feeling of climbing high and looking into the distance.
8. **Folklore**: The folk culture of the Tang Dynasty was rich and colorful, and poets recorded the customs and habits of the time through poetry. For example, Wang Wei's "Remembering Shandong Brothers on September 9th" describes the customs of the Double Ninth Festival.
9. **Art**: Culture and art flourished in the Tang Dynasty, and poets expressed their love and pursuit of art in their poems. For example, Li Bai's "Silent Night Thoughts" reflects his artistic style and pursuit.
The above are the main expressions of Zhongzhou culture in Tang poetry. These poems are a portrayal of social life in the Tang Dynasty and provide valuable information for us to understand and study Zhongzhou culture in the Tang Dynasty.