He was the 2nd Viceroy of Liangguang, covering the provinces of Guangdong, Guangxi and Hainan.
Han Yong obtained his jinshi degree in 1422, and served as a censor.
In 1452, he was promoted as the provincial inspector for Jiangxi; during his tenure, he restored the Tengwang Pavilion.
In 1465, he was appointed as military inspector for a campaign, led by Zhao Fu, against a rebellion of Miao peoples in Datengxia (present-day Guiping, Guangxi).
On the successful conclusion of the campaign, Han Yong was appointed Viceroy of Liangguang to continue pacification efforts, but eventually retired due to attacks from his subordinates.