Usurpation of Qi by Tian the name "Qi" for its realm after the usurpation. For historiographical purposes, pre-usurpation Qi is referred to as "Jiang Qi" (姜齊), and post-usurpation Qi is referred to as "Tian Qi" (田齊). Qi was originally ruled by the Jiang clan, the descendants of Jiang Ziya. In 672 BCE, Prince Chen Wan of the State of Chen fled to Qi following political unrest in his native state and became the progenitor of the Chen clan of Qi, which was later known as Tian. By 545 BCE, the Tian clan was one of the strongest families in Qi. Tian Huanzi, in conjunction with
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