the five powerful rulers who held leadership over the other feudal lords during the Spring and Autumn Period (770-476 BC); while lists vary, the most common includes Duke Huan of Qi [[齐桓公|齊桓公|qi2 huan2 gong1]], Duke Xiang of Song [[宋襄公|宋襄公|song4 xiang1 gong1]], Duke Wen of Jin [[晋文公|晉文公|jin4 wen2 gong1]], Duke Mu of Qin [[秦穆公|秦穆公|qin2 mu4 gong1]], and King Zhuang of Chu [[楚庄王|楚莊王|chu3 zhuang1 wang2]]