She is a Chinese female idol. In 2012, she joined a survival show organised by the Korean company JYP Entertainment called "Sixteen" and was selected as a trainee, but she left the company in 2014. She also made it on the list as one of the possible trainees to debut in Cosmic Girls (WJSN). She is a former member of the girl group LadyBees and she is currently being managed by Mountain Top Entertainment (泰洋川禾), an entertainment company based in Beijing, China and joined her third survival show, Youth with You, which aired in March of 2020. Kong Xue Er ranked 8th and joined the final debut girl group of Youth With You which is called THE9.