According to Sina search, this poem describes summer.
"Sanqu Daozhong" describes the early summer season, which can be seen from the words "when plums turn yellow", "green shade does not decrease" and "orioles". The "plum yellow hour" in the first sentence is the plum rain season in the south of the Yangtze River, referring to May, which points out the time; the "green shade does not decrease" in the third and fourth sentences means that the shade of green trees is thick, refreshing and pleasant; the oriole's crow is sweet and sweet. , these are the scenery of early summer, from which we can infer that it is early summer.
"Sanqu Daozhong" is a seven-character quatrain composed by Zeng Ji, a poet of the Southern Song Dynasty. Original text: The plums are yellow, the sun is clear, the creek is overflowing, and the mountains are running. The green shade does not slow down the journey, and the four or five oriole calls are added.