Appreciate:
During the Tang Dynasty, outings were very popular. For example, Meng Haoran said, "Spring grass is older and the outing is in February and March." According to historical records, during the nearly two months from the 15th day of the first month to Tomb-Sweeping Day in the Tang Dynasty, people were always keen on hiking. This can be seen from the prevalence of suburban outing activities in the Tang Dynasty.
The poet wants to express his gentle sadness by going on an outing in the wild. Unexpectedly, peace and war met in one day, and his mood was very complicated. The poet expressed his feelings of worrying about his country when he was injured through Seeing a Standard, Twilight in Spring City and Drumming, among which "dusk" and "sadness" were perceptible.