1. Great Heat, one of the twenty-four solar terms, is the last solar term in summer. Every year between July 22nd and 23rd in the Gregorian calendar, the sun reaches 120° in the lunar calendar, which is the Great Summer solar term. Like Xiaoshu, Dashu is also a season that reflects the heat of summer, while Dashu means that the weather is extremely hot.

2. The ancient Chinese divided the Great Heat into three periods: "The first period is when the rotten grass becomes fireflies; the second period is when the soil is moist and the heat is soothing; the third period is when it rains heavily." The Great Heat solar term coincides with the "dog days" in the "Dog Days". Around "Zhongfu", it is the hottest period of the year, with the highest temperatures and the fastest growth of crops. At the same time, droughts, floods, wind disasters and other meteorological disasters are also the most frequent in many areas. The tasks of rushing to harvest and planting, fighting drought and floods, preventing typhoons, and field management are very heavy.

3. During the Great Summer Festival, there are customs such as sun-drying ginger, drinking Fu tea, burning incense, and sending "Great Summer Boats". The weather is hot and humid at this time, which can easily cause the body to become overly damp. In maintaining good health, we should not only know how to prevent heatstroke and cool down, but also focus on removing dampness.

4. During the Great Summer Season, around the time of midsummer, the weather has entered the hottest period of the year. This is also the season of rain and heat, with significantly more rainfall than in other months. During this period, farmers must not only pay attention to heavy rains to prevent floods, but also make field preparations to resist drought and ensure harvests.