三友 ,旧称松、竹、梅为岁寒三友。见冯庆京《月令广义·冬金·方物》。白居易《北窗三友》诗 ,以琴、酒、诗为三友。三公 ,周代三公有两说。一说 ,司马、司徒、司空为三公 ,一说 ,太师、太傅、太保为三公。西汉时以丞相 (大司徒 )、太尉 (大司马 )、御史大夫 (大司空 )合称三 Three friends, formerly known as Song, Zhu and Mei, were friends of three years old. See Feng Qingjing’s “Monthly Generalized Winter Jin Fang”. Bai Juyi’s “Three Friends of the North Window” poems, with Qin, wine, and poetry as three friends. Sangong, the three patricks of the Zhou Dynasty said two things. One said that Sima, Situ, and Sikong were three men. One said that Taishi, Taifu, and Taibao were Sangong. In the Western Han Dynasty, the prime minister (Da Situ), Tai Yu (Da Sima), and Ci Shi (Dai Sakong) were jointly called