Dashu est le douzième terme solaire parmi les vingt-quatre termes solaires et aussi le dernier terme solaire de l'été. Douzhiwei, avec une longitude solaire de 120 °, est célébré du 22 juillet au 24 dans le calendrier grégorien. ‘Shu’ means hot, and ‘Da Shu’ refers to the extreme heat of inflammation. La grande chaleur est relativement plus chaude que la chaleur mineure, Et c'est le terme solaire avec le soleil le plus fort et le plus chaud de l'année, avec le pic de “Fuit chaud et humide” à ce moment-là. Les caractéristiques climatiques de Dashu comprennent des températures élevées, chaleur intense, orages fréquents, and typhoons.
The Dashu solar term falls around the middle of the “Sanfu” period, which is the hottest time of the year. During the Great Heat season, the sunshine is intense, the temperature is high, humid, and rainy. Although there may be unbearable heat and humidity, it is very beneficial for the growth of crops, and crops grow the fastest during this period.
Since ancient times, there has been a custom among the people to drink herbal tea (Fucha) during the three days of the Great Heat; Fucha, as the name suggests, is a type of tea consumed during the Sanfu period. This tea, brewed with traditional Chinese herbs, has a cooling and heat relieving effect. en plus, there are customs such as burning incense and sun drying ginger. Dashu “is the hottest and most humid season of the year, during which the focus of health and wellness is on” preventing heatstroke “et” dispelling dampness “.