"Eighteen members of Zhang appeared outside the Ministry of Water Affairs in early spring" and "Jiang Nanchun's quatrains" both describe spring. What's the difference between the seasons they describe? Please provide a justification for the answer. The early spring in Tang Hanyu's Eighteen Members of Zhang Shui Department Appeared in Early Spring describes the early spring season around the beginning of the spring rain, which can be seen from the title "Early Spring". At this time, the vegetation began to sprout, winter went and spring came, and everything was recovering. Du Mu's "Jiangnan Spring" and "A Thousand Li Ying Ge Green Reflects Red" describe the four seasons around the "vernal equinox". At this time, the grass grows and the flowers are red and green, which is the season of full bloom. After that, "Qingming, Grain Rain" is late spring, and it will be colorful. Personal opinion, not necessarily right.