[3] Born in Hong Kong to parents from Taishan, Guangdong, China,[4][5] Leung emigrated at age six with his family to the United States in 1966.

He lived one year in Aurora, Illinois, learning to speak English before moving to Minneapolis, Minnesota, residing south of the Lyn-Lake area.

Leung returned to Minnesota to practice at Faegre & Benson, where he was an equity partner focusing on real estate and other business transactions until he joined the state bench.

[8] Leung, who was re-elected in 1996, 2002 and 2008, presided over a wide variety of subjects, including civil,[9][10] criminal,[11] child protection and juvenile delinquency cases.

He is or has been on the boards of Wishes & More, Northern Star Council, Boy Scouts of America, and Lakewood Cemetery Association.