 During the Song dynasty, he was further awarded the titles of Duke of Danyang () and Duke of Wu ().Yan Yan's hometown is believed to be in modern Changshu, Jiangsu province, which was the territory of the State of Wu during the Spring and Autumn period.During the reign of Emperor Wu of Han (r. 156–87 BC), Yan Yan's descendants built a tomb complex for him in Changshu, and it has been rebuilt several times.