Summary
The article uses entry into Fu as a starting point, explaining the astronomical definition of 'San Fu'—'San Fu' is counted starting from the third Geng day after the Summer Solstice; the third Geng day is the initial Fu, the fourth Geng day is the middle Fu, and the first Geng day after the start of autumn is the final Fu. This year the San Fu period lasts 40 days, classified as a 'long San Fu'. The article also introduces regional customs such as eating dumplings on entry into Fu in northern China (symbolizing 'treasure of fortune') and eating mutton in Xuzhou, Jiangsu on Fu day (the saying 'A bowl of soup with mutton on Fu, no medicine needed'), emphasizing dietary regulation to cope with the heat, and provides scientific heat-prevention suggestions: moderate exercise (choose early morning or evening, avoid intense exercise), reasonable routines (following the seasonal pattern of 'going to bed late and getting up early', with a short nap at noon to recover energy, avoiding staying up late), avoiding overcooling (air-conditioned rooms should not be set too cold, and ventilation should be noted), as well as post-exercise precautions (drink water in small amounts frequently, avoid cold drinks).
Main Points
* 1. Entry into Fu's astronomical definition and this year's San Fu duration.
'San Fu' is determined by 'San Geng' after the Summer Solstice; the initial Fu and final Fu each last 10 days, while the middle Fu's length depends on the number of Geng days between Summer Solstice and Start of Autumn (four Geng days equal 10 days, five Geng days equal 20 days). This year the San Fu period lasts 40 days, classified as a 'long San Fu'.
* 2. Regional dietary customs during entry into Fu.
Some northern regions have the tradition of eating dumplings on entry into Fu, symbolizing 'treasure of fortune'; in Xuzhou, Jiangsu and surrounding areas, it is popular to eat mutton on Fu day, with the saying 'A bowl of soup with mutton on Fu, no medicine needed', emphasizing dietary regulation to cope with the heat.
* 3. Scientific heat-prevention recommendations on exercise and daily routine.
It is recommended to engage in slow-paced outdoor exercise (such as swimming, Tai Chi) in the early morning or evening, for 30 minutes to 1 hour daily; in terms of routine, follow the seasonal pattern of 'going to bed late and getting up early', with a short nap at noon to recover energy, and avoid staying up late.
* 4. Precautions to avoid overcooling.
After exercise, it is not advisable to take a shower or consume cold drinks immediately; water intake should be taken in small amounts frequently; air-conditioned rooms should not be set too cold, and ventilation should be ensured, and outdoor activities should be reduced during peak heat periods.