'when the cold wind rises, maple leaves fill the steps, and everything is collected. Drizzle produces cold, and stingers sleep. Negative greetings in front of the window, warm up by light. Orange red and orange yellow, cold stove for tea《 It is recorded in the collection and interpretation of the seventy-two seasons of the lunar order: the establishment is also the beginning of the establishment. Winter is the end, and all things are collected. "&# 8203;
Lidong, one of the 24 solar terms, is also one of the traditional festivals of the Han nationality. It is the end of Xuyue and the beginning of Haiyue; The time point is between November 7 and 8 of the Gregorian calendar, that is, the sun is located at the Yellow meridian 225 & deg;. At this time, the sun is at declination -16° 19 \ ', the noon sun height in Beijing is only 33 & deg; 47\'。 After the beginning of winter, the sunshine time will continue to shorten and the noon sun height will continue to decrease. During the beginning of winter, the Han people began winter with the winter solstice, which needed tonic to survive the severe winter.