Moral: Mei: I am proud of exploring waves and cutting ice and snow. I am proud of myself. I am a noble and upright person; Lan: The hollow valley is secluded, narcissistic, fragrant and elegant, and is a sage in the world; Bamboo: the screen makes the moon, and it is chic and elegant all its life, which is modest; Song: Elegant, maverick and not aggressive, he is a hermit.
Source: This is a couplet made by the ancients. Three friends of pine, bamboo and plum; Peach, plum and apricot are warm in spring. The first part of the couplet first lists pine, bamboo and plum, and then it is called "three friends who are old and cold" by scholars. The same is true of the second couplet. Peach, plum and apricot bloom in early spring. They have different colors such as red, white and pink. The ancients often used them instead of spring, so they called them "warm families in spring".