Three Friends of Winter

The Three Friends of Winter is an art motif that comprises the pine, bamboo, and plum. The Chinese celebrated the pine, bamboo and plum together, as they observed that these plants do not wither as the cold days deepen into the winter season unlike many other plants. Known by the Chinese as the "Three Friends of Winter", they later entered the conventions of East Asian culture. Together they symbolize steadfastness, perseverance, and resilience. They are highly regarded in Confucianism and as such represent the scholar-gentleman's ideal.
History.
The Three Friends of Winter are common in works of art from Chinese culture and those cultures influenced by it. The three are first recorded as appearing together in a ninth-century poem by the poet Zhu Qingyu () of the Tang dynasty. The Southern Song dynasty artist Zhao Mengjian (, c. 1199–1264), among others of the time, made this grouping popular in painting.
The actual term "Three Friends of Winter" can be traced back to the earliest known mention in literature, the "Record of the Five-cloud Plum Cottage" () from "The Clear Mountain Collection" () by the Song dynasty writer Lin Jingxi (, 1242–1310):
Cultural symbolism.
Culturally, the "Three Friends of Winter"—pine, bamboo, and plum—are grouped together in the context of winter because they all flourish in that season. For this reason they are commonly known as the "Three Friends of Winter". They are also referred to simply by their linked names: "Song Zhu Mei" () in Chinese, transliterated as "Sho Chiku Bai" in Japanese (literally "pine, bamboo, plum") or "Song Jug Mae" () in Korean.
In a Korean poem by Kim Yuki (1580–1658), the three friends are brought together in order to underline the paradoxical contrast:
In Japan, they are particularly associated with the start of the New Year, appearing on greeting cards and as a design stamped into seasonal sweets. Shōchikubai () is sometimes also used as a three-tier ranking system. In this context, the pine (matsu, ) usually is the highest rank, followed by bamboo (take, ) as the middle rank, and plum (ume, ) as the lowest. 
In Vietnam, the three along with chrysanthemum create a combination of four trees and flowers usually seen in pictures and decorative items. The four also appear in works but mostly separately with the same symbolic significance.