First Name: Zheng Ting
Family Name: Zhu
Native name: 朱正廷
Also Known as: 정정;Zhengthing;Jung Jung
Nationality: Chinese
Gender: Male
Born: March 18, 1996

Zhu Zheng Ting, is a Yuehua Entertainment trainee who joined Produce 101 Season 2 in 2017, where he was known by his Korean stage name, Jung Jung. His initial rank in the show was C, but he eventually moved to D class after the second evaluation. He was then eliminated on the 8th episode.
In January 2018, he participated on a Chinese survival program called "Idol Producer". Three months after the show, Zhu Zheng Ting was revealed to be the 6th member of Nine Percent. He also debuted as the leader of NEX7 under Yuehua Ent. in June 2018.
He is known to fans for his talent in dancing and makeup. According to his 2017 profile, he learned ballet, modern dance and traditional dance since he was young. He had performed modern dance a lot of times during his trainee days, with Jessie J's Flashlight being his audition song in Produce 101. He also showcased his vocal skills a few times during the program and their concerts.
Despite having his first TV exposure in South Korea, Zheng Ting is currently active in China.