What is the moral and symbol of the Ninth Five-Year Plan?

There is a saying in the China lunar calendar called "Jiujiu", which is used to calculate the seasons. The calculation method is from winter to Sunday, every nine days is a cycle, the first nine days are called "Yijiu", the last nine days are called "Erjiu", and so on until "Jiujiu". After 998 1 day, winter will pass and spring will come.

Because the count of nine starts from the solstice in winter, there is a saying of "nine cold days". The number nine reflects the general situation of winter temperature changes in China, such as the "Jiujiu Song" widely circulated in the middle and lower reaches of the Yellow River: 1929 Don't shoot; Walking on the ice in 3949; 5969, see the willows along the river; Seven or nine rivers open, and eight or nine geese come; 99 plus 19, plowing cattle everywhere.

In addition to "Jiujiu Song", it is also a custom in old Beijing to draw a "Jiujiu Cold Map" from the solstice in winter. It's a plum blossom picture with 865,438+0 petals. Every day, 1 petal is dyed with a pen, and 8 1 petal will arrive after spring, so it is called "99 cold map".