What is the hottest of the 24 solar terms, what is the refrigeration, what is the longest day and what is the shortest day?

Summer: bucket refers to C. solar meridian 120. Is the hottest solar term in a year,

Great cold: fighting refers to ugliness, and the sun has 300 yellow meridians. Great cold refers to extremely cold weather. Around the Great Cold is the coldest season of the year.

Summer solstice: Beidou points to B. The meridian of the sun is 90 degrees. When the sun is at the "Summer Solstice Point" at 90 degrees of the yellow meridian, it is almost directly above the Tropic of Cancer, and the sun is the highest in the northern hemisphere at noon. This day is the longest day and the shortest night in the northern hemisphere.

Winter solstice: fighting fingers. The meridian of the sun is 270 degrees. On the solstice of winter, the sun shines almost directly on the tropic of Capricorn. Our northern hemisphere has the shortest day and the longest night, and it has begun to enter several cold days.