From the Chinese TV drama <The Great Revival>
Goujian (Chinese: 勾踐) (reigned 496–465 BC) was the king of the Kingdom of Yue (present-day northern Zhejiang) near the end of the Spring and Autumn Period. Goujian was the son of King Yunchang of Yue.
King Goujian's reign coincided with arguably the last major conflict of the Spring and Autumn Period, the struggle between Wu and Yue, wherein he eventually led his state to victory, annexing the rival. As such King Goujian is sometimes considered the last of the Five Hegemons
Whilst ruling his kingdom, Goujian never relished kingly riches, but instead ate food suited for peasants, as well as forcing himself to taste bile, in order to remember his humiliations while serving under the State of Wu. The second half of a Chinese idiom, wòxīnchángdǎn (臥薪嚐膽 "sleeping on sticks and tasting gall"), refers to Goujian's perseverance.