It's not strange to be strict, but strict, which means to welcome spring and winter in the first month.

Don't blame Yan Ning. The turn of spring and summer is in the first month, which means that although it is still winter, it is not far from the first month of spring. In addition to explaining the slight cold, it also expresses the poet's expectation for spring. Entering the slight cold means entering the twelfth lunar month, which really means that the old year is over and the new year is about to begin. From Yuan Zhen's poem "Twenty-four Qi", the slight cold December Festival in the Tang Dynasty.

In the Tang Dynasty, Yuan Zhen's "Poem of December Festival of Twenty-four Qi and Slight Cold" originally wrote: The slight cold is connected, and the magpies build new nests. Picking up food to find a winding path, holding purple around the treetops. The frost eagle is near the north, and it is hidden. Not strange but strict, spring and summer are in the first month. The solar term "slight cold" is coming, just like "Luda", the head of the ancient "melody", playing, and the magpies at this time also perceive that spring is not far away.

They began to build new nests. They always like to go to places where rivers bend, because it is convenient for them to bite branches and wet mud and then build nests around the treetops. The geese began to show signs of returning to the north, and the pheasants also hid in the grass to sing. Don't complain that the weather is still cold and severe, because the alternation of spring and winter will happen in the first month soon.

At the beginning of the poem, the word "Da Law" in the sentence "Han Xiao Da Lian Law" comes from the idiom "Huang Zhong Da Law" and refers to the twelve laws in ancient times. Huang Zhong and Da Lu are the first laws of Yin and Yang respectively. At the same time, the ancients also used these twelve methods to refer to the twelve months in the calendar, with the yellow bell corresponding to the sub-month, that is, November of the lunar calendar, and Dalu corresponding to the ugly month, that is, December.