What does it mean that the 24 solar terms are connected with the heat?

Does the subject want to ask, "What is the meaning of the connection between the 24 solar terms and heatstroke?" It is the connection between the two solar terms of summer and summer. After the slight summer heat, it is the great summer heat. From Four Seasons Songs (Twenty-four solar term song). Spring rain surprises spring and clear valleys, and summer is full and summer is hot. Autumn dew, autumn frost, little snow in winter and cold in winter. The two festivals remain unchanged every month, with a maximum difference of one or two days. The first half of the year is June 2 1 day, and the second half is August 23.