Duke Ling of Qi Duke Ling of Qi Duke Ling of Qi (; died 554 BC) was from 581 to 554 BC ruler of the State of Qi, a major power during the Spring and Autumn period of ancient China. His personal name was Lü Huan (呂環), ancestral name Jiang (姜), and Duke Ling was his posthumous title. Duke Ling succeeded his father Duke Qing of Qi, who died in 582 BC after 17 years of reign. In 572 BC, Duke Dao of the State of Jin attacked Qi. Duke Ling made peace with Jin by sending his son Prince Guang (later Duke Zhuang
What Love Is Made Of three minutes and fifty-five seconds (3:55), "What Love Is Made Of" is an uptempo dance and house track that has been described as "rave-y" and "trance-y". Its instrumentation contains the sounds of pianos and synthesizers. Jordan Sargent of "Spin" observed that it continued the musical style first introduced in Katy's 2012 extended play (EP), "Danger EP", which was "straight-forward house". Idolator's Sam Lansky compared her performance in the song to recording artist Siobhán Donaghy. Critical response to "What Love Is Made Of" was generally positive: most critics noted Katy's vocal performance and commended its sound. Siân Rowe from "NME" was