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Cai Xukun, better known by the mononym Kun, is a Chinese singer-songwriter, dancer and actor. He debuted as a member of SWIN and its sub-unit SWIN-S on October 18, 2016, after participating in the first and second seasons of the Chinese reality show Super Idol. After leaving the group and its company Yihai Entertainment, he participated in iQiyi's reality survival show Idol Producer, finishing first and debuting as the leader/center of temporary Chinese boy group Nine Percent, on April 6, 2018. He was a cast member of variety show Keep Running from 2020 to 2022. Most of Kun's solo works are original, including "Wait Wait Wait" and his first EP "1". The EP was a commercial success with every song topping Chinese music charts. "Pull Up", the first track, broke 10 records and peaked at number 1 on four of QQ Music's charts as well as ranking first on Billboard China's V Chart for 8 consecutive weeks. At the time of its release in 2018, "Wait Wait Wait" debuted at number 1 on QQ Music's New Song list and Popular Music list for 10 weeks and won the title of Asia's hottest song for 4 consecutive weeks. On January 10, 2019, Kun was officially named China-Jamaica Goodwill Ambassador and China-Jamaica Outstanding Youth Leader in Shanghai, China. In February, Kun announced his first solo tour, "Kun ONE North America/U.K. Tour 2019", coming in early April 2019. After wrapping up the tour on July 26, Kun released his second EP titled "Young", which consists of two songs, "Young" and "Blindfolded". Upon release, this EP did exceptionally well in Chinese music charts, selling 5.67 million copies in a week, for which he was dubbed "King of Digital Singles".