What is the connection between fright and the Millennium solar terms?

Hello: Sting occurs on March 5 or 6 every year, and it is called "sting" when the sun reaches 345 degrees of the yellow meridian. Sting means that when the weather gets warmer, the spring thunder begins to sound, awakening the insects that are dormant and hibernating underground.

Millennium is the first solar term in August. Millennium-the temperature began to drop, the weather turned cold, and there were dew on the vegetation in the morning. The Millennium is around September 7 of the Gregorian calendar every year.

In terms of time, the two are not directly related, one is in spring and the other is in autumn.