Mark Tuan (Chinese: 段宜恩; Pinyin: Duàn Yí Ēn), is a rapper in K-Pop septet GOT7. Mark is Taiwanese but grew up in America before being scouted by JYP Entertainment and moving to Seoul to train and eventually debut with GOT7 in 2014. Tuan released his solo debut album, the other side in 2022.

In addition to being a lead rapper, Mark is also known as the visual of the group and has graced the cover of numerous magazines both in China and Korea. In 2018, he released his first apparel line with Represent titled XCIII.

He also began individual activities in China, including an appearance as a guest judge on the popular competition show All for One.