What do you mean by "three friends in a cold year"?

Three friends in cold years refer to pine trees, bamboo and plum blossoms. Pine and bamboo do not wither in winter, plum blossoms are cold-resistant and open in early spring, hence the name. "suì hán sān yǒu ǒ u": The traditional meaning of China is that pine, bamboo and plum endure in winter, so it is called "three friends of the old cold".

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Allusions source:

The fourth fold: "After the late autumn, everything withers, except pine, bamboo and plum blossom, the three friends of cold age. Yi Yu Cong Kao Volume 43 Cold Three Friends. Song Lin Jingxi's Notes on the King: "Even if you live in a tired place, you will grow hundreds of plums, and you will be a cold friend. "

Pine and bamboo don't wither in winter, but plum blossoms bloom when they are cold, so they are called "three friends in cold years" In the old society, when getting married, couplets of "bamboo shoots are born on the edge and plum blossoms are red and solid" were often posted around the gate, because "bamboo shoots" and the word "sun" of later generations are homophonic and appear at the same time. Make pine, bamboo and plum into a ball; Divided into three groups, the pine, bamboo and plum are represented by simple lines to form a pattern: the cave gate composed of pine, bamboo and plum.

Baidu Encyclopedia-Cold March