Duke Ai of Qi Jing on the throne, later known as Duke Hu of Qi. Duke Ai of Qi Duke Ai of Qi (; reigned 9th century BC) was the fifth recorded ruler of the ancient Chinese state of Qi during the Western Zhou Dynasty. His personal name was Lü Buchen (呂不辰), ancestral name Jiang (姜), and Duke Ai was his posthumous title. Duke Ai succeeded his father Duke Gui of Qi as ruler of Qi. Duke Ai had a dispute with the marquis of Qi's neighbouring state Ji (紀). King Yi of Zhou sided with Marquis of Ji and executed Duke Ai by
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