The summer solstice is not the beginning of ambush.

The summer solstice is not the day of the summer solstice. The summer solstice is usually around June 22. On this day, the weather begins to gradually get hotter, accompanied by thunderstorms.

It is generally eaten from the summer solstice and counting backwards. When counting to the third Geng day, it starts to enter the ambush. The Geng day here generally refers to the day with the prefix "G" in the ancient "Stem and Branch Day Calendar".

Rufu means entering the dog days of summer. "Summer solstice three Geng several heads fall", this is the basis for establishing the first fall. The almanac stipulates: "On the third Geng day of the summer solstice, the number of volts will begin." This means that counting from the summer solstice to the next, the volts of volts will begin on the third Geng day. The "Geng Day" here refers to the day with the prefix "Geng" in the ancient "Stem and Branch Day Calendar".