? ?¢?’Ⓢ ??????? had the name Jung Jae Hyun when he was born. But he changed his name to Jung Yoon Oh. He was ولد في سيول ، كوريا الجنوبية ، 14 فبراير 1997.
December 2013, BC. Entertainment announced that Jaehyun was officially a member of SM Rookies. 3 years later, ??????? joined the first unit of ???, NCT U with Taeil, Taeyong, Doyoung, Ten and Mark to be precise on April 4, 2016.
BC. Entertainment then announced the second NCT unit, ??? 127 on July 1, 2016. ??????? with Taeil, Taeyong, Yuta, WinWin, Mark and Haechan made their debut through the songs ???? ????? ??? ???? ?????.

??????? is known to have fluent English skills. He is also good at swimming. ?????? ? ????????? ?????, it turns out that Jaehyun's idol is the beautiful IU.

??????? has several hobbies. These include playing the piano and exercising. His النشاط الرياضي المفضل هو كرة السلة. Even though he has a body that always looks proportional, in fact ??????? is a person من يحب أن يأكل كثيرا.
Even his group mate, Taeyong said that ??????? was the most muscular member compared to other ??? members.
Not only singing, ??????? has also been an MC in several programs. Like the music program Show Champion and also being an announcer on the SBS radio show, ???’? Night Night with Johnny.

@donediving

? fi met me?

? I like u already

? cool

? ?. cool

? #Sersan. seems scary, but that's okay cz u fucking cool, dude?

? #harl : cool tapi jamet

? #C. so cool

? ?. cool personality

? Kece

? Humble

? #jél cool

? Scary

? cool

? cakeppp

? handsome and cool

? kinda scary && c?l

? #?? cool,handsome and friendly agaknya

? maaf sender dibawah saya, ini punya saya ??

? jangan ambil dia punyaku

? intimidating?

? ?. cool terus agak serem gitu hehe

? ?。so cool

? 8. cool

? ? ๋៹ ? ࣪‌ ۪ OMG ！ cco cool betul hαndsome

? cool

? handsome

? cool & kinda intimidating

? Handsome

? cool ??

? #?R ࣪ ▸ nyeremin si tapi ganteng

? #NYN ngh (ngeri, ganteng, hwangi)??

? HANDSOME JSJSJSJS

? ??‍♀️. cool and kinda intimidating

? #jfck cool

? ♡゙ ?‍⬛️ ࣪ ִֶָ handsome and cool but kinda scary ??

? cool

? Really cool person

? ?. friendly myb

? kece

? #?lr you scary me, oww

? #eca. Cool banget

? you kinda cool ?‍?

? kinda intimidating, and hot boyfie able ig

? 《?》. COOLLLL and looks friendly but lil bit intimidating

? #??? hot n cool

? ini kita ga sfs an???

? ihacoy raz

? Tidak tau.

? ??. cakep tp rada miris

? kece, gantengg

? ganteng bangett lohhh

? cool and seems friendly

? ⊹ ໋.ˑ? ִֶָ cool

? ??ָ֢֢?|| kindα scαry but gαnteng ??

? ?˖ scary D:

? 54 people have voted so far.
? Anonymous Board