yoon jeonghan, also written as 윤정한 is a member of the south korean boy group seventeen, belonging to the one of the three sub-units existing -- the vocal unit.

• name: yoon jeonghan
• hangul: 윤정한
• birthdate: october 4, 1995 (951004)
• astrological sign: libra
• nicknames: eldest maknae, angel, 1004
• birthplace: seoul, south korea
• svt subunit: vocal
• education: hyangnam high school (graduated '14)
• height: 178cm
• blood type: b
• hobbies: sleeping, basketball, soccer, badminton
• training period: 2 yrs 2 mo
  • has a little sister
  • doesn't like candies
  • likes to buy pretty socks
  • majored in natural science in high school
  • ranked 3rd in his school
  • looks up to shinee's taemin ¹
  • coffee: americano or vanilla latte
  • 20 > adore u
  • sleepiest/weakest of the group ²
  • seems quiet, but isn't

¹: jeonghan looks up to shinee's taemin, due to his growth since debut! taemin started as a main dancer, focusing on his dancing rather than vocals. now he's released music as a soloist and has broken records.

²: jeonghan gets tired easily and sleeps wherever and whenever he can. when he feels tired at broadcasting stations, he would tell everyone he needs to use the washroom but he’s actually sleeping there for 5 minutes.