The origin of observing the age must be 30 words.

The trend of observing the age rose in the Southern and Northern Dynasties, and many scholars in the Liang Dynasty had poems about observing the age. "One night for two years, five hours for two years." People light candles or oil lamps and keep vigil all night, which symbolizes driving away all evil diseases and epidemics and looking forward to good luck in the new year. This custom has been passed down from generation to generation.

Keeping the old year is the custom of staying up late to welcome the new year on the last night of the old year. Also known as New Year's Eve, the common name is "Enduring the Year". In ancient times, observing the age has two meanings: the old man's observing the age means "resigning from the old", which means cherishing time;

Young people keep their age in order to prolong the life of their parents. Since the Han Dynasty, the time for the alternation of the old and new years is generally at midnight. On New Year's Eve, men, women and children will be brightly lit and get together to watch the New Year. Therefore, observing the age is one of the customs of the Spring Festival.