Lidong, one of the twenty-four solar terms in the lunar calendar, is also one of the traditional Chinese festivals. It is one of the twenty-four solar terms in the lunar calendar and one of the traditional Chinese festivals. It is celebrated on November 7-8 of the Gregorian calendar.

Lidong is the nineteenth of the twenty-four solar terms and the beginning of winter. It occurs when the handle of the dipper points to the northwest and the sun's yellow meridian reaches 225°, and the festival is celebrated between November 7-8 on the Gregorian calendar each year. The first day of winter is the beginning of the year, and the last day of the year is the end of the year, when all things are collected. Winter, means that anger began to close storage, all things into the state of recuperation, collection. Its climate is also dry from the autumn rain to the rainy and cold winter climate transition.

Seasonal division of the commonly used methods are mainly "festival method" and "temperature method". Traditionally in China, the "24 solar terms" of the "winter" as the beginning of winter; the "solar terms" method of winter, indicating that everything enters a state of rest, collection. The "temperature method" divides the season with the average daily temperature falling steadily to below 10 ℃ for five consecutive days as the beginning of winter; the temperature method divides the winter, indicating that the weather is cold.

Lidong represents the beginning of winter, and it is one of the seasonal nodes that Chinese folk attach great importance to, with spring plowing and summer cultivation, autumn harvesting and winter storage, and winter is the season of enjoying a good harvest and recuperating. Winter is also one of the "four seasons and eight festivals" in ancient society, is a very important festival, in some parts of China, there are ancestor worship, drinking feasts and other customs.