What are the three stages of vernal equinox and solar terms?

The three stages of the vernal equinox solar terms are: the arrival of a mysterious bird, the sound of thunder and thunder, and the beginning of electricity. "Wait for the blackbird to arrive" is based on the ancient measure: "Wait for the blackbird to arrive at the beginning". Blackbirds refer to swallows and belong to seasonal migratory birds. In the spring equinox, the weather in the north gets warmer. Swallows who spent the winter in the south fly back to the north, nest with grass and mud, and start a new year's life.

"Wait for the thunder". Five days after the thunder, I saw lightning. Although it thunders, the real rainy season is at the vernal equinox. At this time, the weather is getting warmer, the rain is increasing, and the air is humid, so there is a second-class "Lei Naisheng".

"Third-class electricity" is accompanied by lightning because of the increasing rainfall. At this time, people can often see lightning splitting from the clouds. Ancient literati imagined these natural phenomena as living immortals and wrote them into their works, so there appeared immortal images such as Shi Feng, Apollo, Lei Gong and Dian Mu in China literature. At this time, the solar terms are opened, and it is the begonia, pear flower and magnolia in the twenty-four Hua Xinfeng.

The vernal equinox is one of the 24 solar terms and the fourth solar term in spring. The fingers do not match, the longitude of the sun reaches 0, and the festival is held on March 19-22 of the Gregorian calendar every year. The vernal equinox is of great significance in astronomy. On this day, the northern and southern hemispheres are divided equally day and night. Since then, the direct position of the sun has continued to shift from the equator to the northern hemisphere. The days in the northern hemisphere are longer than the nights, while the southern hemisphere is the opposite.