Dashu es el duodécimo término solar entre los veinticuatro términos solares y también el último término solar del verano. Douzhiwei, con una longitud solar de 120 °, se celebra del 22 al 24 de julio en el calendario gregoriano. ‘Shu’ means hot, and ‘Da Shu’ refers to the extreme heat of inflammation. El gran calor es relativamente más caliente que el calor menor, Y es el término solar con el sol más fuerte y más popular del año, con el pico de “humeante y caliente” en este momento. Las características climáticas de Dashu incluyen altas temperaturas, calor intenso, tormentas eléctricas frecuentes, 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. Además, 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 “y” dispelling dampness “.