What is the poem at the beginning of autumn?

Summarized as follows:

1, Lv Ting has many fallen leaves, so she knows it's autumn. -"Appreciating Liu Chai Sang"

2. When you ask about the untimely return date, late rain will rise in the autumn pool. -"A Letter to a Friend in the North on a Rainy Night"

3, solve the three autumn leaves, you can open February flowers. -Li Qiao "Wind"

4. Autumn wind rises in Bai Yunfei, the plants are yellow, and the geese return to the south. -"Autumn Wind"

The south is a wilderness, because the leaves are falling and the wind from the north makes the water cold. -Tang Meng Haoran's "Early Cold Jiang Huai"