In feng shui, the term Five Emperor Coins refers to a set of cash coins that were produced during the early and High Qing eras when the Qing dynasty was at its height both militarily and economically. This set includes authentic cash coins produced during the reigns of the Shunzhi, Kangxi, Yongzheng, Qianlong, and Jiaqing Emperors. As this period was when China's national power was the strongest, the authority of the emperor dominated, and Chinese society enjoyed stability. The Five Emperor Coins are seen as having the essence of "heaven, earth, and people".