Yoon Jeong-han (born October 4, 1995, in Seoul, South Korea), known mononymously as Jeonghan, is a South Korean singer under Pledis Entertainment. He is a member of the popular boy group Seventeen and its Vocal Team. In addition to group activities, Jeonghan has pursued solo projects, showcasing his musical artistry. Jeonghan released his first solo digital song, "Dream", in 2021, which he wrote and produced alongside Prismfilter. In 2022, he covered Mosawo's "Aitai" as part of Seventeen’s #17Studio series. His versatility extended to radio when he became a presenter for Tokyo FM’s School of Lock from April 2022 to December 2023. In 2024, Jeonghan debuted in Seventeen's subunit JxW with Wonwoo, releasing the single album This Man. The album achieved massive success, breaking records for a K-pop subunit's first-week sales. His solo track "Beautiful Monster" was featured in the album. Expanding his solo career, Jeonghan collaborated with Japanese band Omoinotake for the song "Better Half", released on January 27, 2025. A Japanese version was included in Omoinotake’s album Pieces.