K.O. 3an Guo is a Taiwanese television series starring George Hu, Xiu, Kirsten Ren, and three out of four members of Fahrenheit as special guests, who starred in the prequels. The title is pronounced as K.O.-san-guo. It is the third installment of the Zhong Ji series; preceded by KO One and The X-Family. This series is a spoof of the 14th century Chinese historical novel Romance of the Three Kingdoms by Luo Guanzhong.

George Hu is an American-born actor and singer based in Taiwan. He speaks fluent English, Mandarin and Taiwanese Hokkien. Since 2011, he has been signed to Yang Deng-kui's management company Polyland International Entertainment.