From
刘禹锡's
蜀先主庙, on the temple of
刘备, first ruler of Shu:
势分三足鼎,
业复五铢钱, 'his power split the realm like the three legs of a tripod, and he set out to bring back the five-zhu coin', the money of the Han he hoped to restore. The tripod image is the one in
三足鼎立.