杨宇恩, better known as 莫宰羊, was born on October 23, 1998, in Hualien County, Taiwan. As a rapper, he gained initial recognition as part of the rap group BackMountKrew. At the age of 18, 莫宰羊 uploaded his first original track, "悲情城市", to StreetVoice, marking his debut in the music scene. In 2019, 莫宰羊 released his debut album 幻想曲. He followed this with several notable singles, including "国王" (2020), a collaboration with Asiaboy禁藥王 and Lizi栗子. His subsequent releases included collaborations with various artists such as G5SH in 2020 for the track "舉刀自盡", and with 林志融 (Marz 23) on "最美的風景" in 2021. He also contributed to tracks like "Cold" by 派偉俊 and "匆匆那年" with 林采欣 in 2022. In 2025, he worked with Tyson Yoshi, Juice Boy and Patrick Brasca on the track "瑪格莉塔".
