Zhu Zheng Ting
- Name: 朱正廷 / Zhu Zheng Ting
- English name: Theo
- Also known as: 정정 / Jung Jung
- Profession: Actor and singer
- Birthdate: 1996-Mar-18 (age 25)
- Birthplace: Ma'anshan, Anhui, China
- Height: 183cm
- Star sign: Pisces
- Chinese zodiac: Rat
- Blood type: O
- Talent agency: Yuehua Entertainment
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 in a Chinese survival program called "Idol Producer". Three months after the show, he emerged as one of the top 11 contestants, and became the 6th member of Nine Percent. He also debuted as the leader of NEXT under Yuehua Entertainment 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.
Despite having his first TV exposure in South Korea, Zheng Ting is currently active in China.
- Su Ji (2022) as Qi Fengxiang
- Novoland: The Princess From Plateau (2021) as Yi Wuyou
- The Silence of the Monster (2021) as Luo Bin
- Vanguard (2020) as Shen Diao
- Marna (2018, post-production) as Li Cong
- 2019 16th Esquire Man At His Best Awards: Charity Ambassador of the Year
- Education: Shanghai Theatre Academy (Department of Chinese Dance)
- C-Pop Group: NEXT, Nine Percent (disbanded)
- Skills: Ballet, modern dance, makeup