Xu Kai is a Chinese actor and model. In 2013, he won the still model group championship at the national finals of the China International Model Competition held in Guangzhou, and he debuted as a model. In 2016, he signed a contract with Huanyu Film, an entertainment company owned by Yu Zheng, and entered the entertainment industry. He was cast in his first television series Zhao Ge, where he plays Yang Jian.

In 2018, Xu starred in the historical romance drama Untouchable Lovers, followed by the palace drama Story of Yanxi Palace. He gained mainstream recognition with his role as Fucha Fuheng in Story of Yanxi Palace, which was a huge hit in China and across Asia.

In 2019, Xu made his big-screen debut in the romance film "Autumn Fairy Tale". The same year, Xu played his first lead role in Xianxia series, "The Legends". The same year, he starred in the youth military series "Arsenal Military Academy", winning the Best Actor award at the the 6th Hengdian Film and TV Festival of China "Wen Rong Award" for his role. He also earned the Hengdian Film and Television Honors and was appointed as the spokesperson of Hengdian. He has also won several awards including the Most Popular TV Actor of the Year Award from 2019 iQiyi Scream Night, StarHub Night of Stars 2019 Best Actor award.

In 2020, Xu starred in the historical fantasy drama Dance of the Sky Empire.

In 2021, Xu leads in the Chinese e-sport romance comedy television series Falling Into Your Smile as Lu Si Cheng or Chessman. Added to that is his another hit drama as Bai Jue in Ancient Love Poetry.

Forbes China listed Xu under their 30 Under 30 Asia 2019 list which consisted of 30 influential people under 30 years old who have had a substantial effect in their fields.