What did the ancients express with pine and bamboo?

Song is Xueyou and his brother Lan; There are branches and incense. Not afraid of the cold, laughing at the frost and snow.

Bamboo is open-minded and cheerful. Often accompanied by Qiu. Frost and snow do not fade, and the seasons are evergreen. Banqiao heard the people cry, and it will last forever, and it is worthy of the chest.

The ancients interacted with it, and Wen Songtao and Zhu appealed for inspiration. Today's people keep their scrolls and are eager for success.