Duke Zhuang II of Qi
Duke Zhuang II of Qi (; died 548 BC) was from 553 to 548 BC ruler of the State of Qi, a major power during the Spring and Autumn period of ancient China. His personal name was Lü Guāng (呂光), ancestral name Jiang (姜), and Duke Zhuang was his posthumous title. He was the second of the two Qi rulers called Duke Zhuang. Before ascending the throne he was known as Prince Guang. Accession to the throne Prince Guang was the son of Duke Ling of Qi and his concubine Sheng Ji. In 572 BC Duke Dao of the state of Jin attacked Qi. Duke Ling made peace with Jin by sending Prince Guang to Jin as a hostage. In 563 BC, Guang was made the crown prince of Qi. However, Duke Ling later deposed him and made his half-brother Ya the new crown prince, at the request of his favorite concubine Rong Zi. In the fifth month of 554 BC, Duke Ling died after 28 years of reign, and the powerful minister Cui Zhu installed Guang on the throne instead of the new crown prince Ya. Prince Guang is posthumously known as Duke Zhuang II of Qi. Cui Zhu