In 637, as a part of Emperor Taizong's scheme to bestow prefectures on his relatives and great generals and officials as their permanent domains, Li Jing's title was changed to Duke of Wei, and he was given the post of prefect of Pu Prefecture (濮州, roughly modern Heze, Shandong), to be inherited by his heirs. Soon, however, with many objections to the system, the strongest of which came from Zhangsun Wuji, Emperor Taizong cancelled the scheme, although Li Jing's title remained Duke of Wei. In 640, Li Jing's wife died, and Emperor Taizong ordered that a large tomb, made in the shape of Mount Tie (鐵山) in Eastern Tujue territory and Mount Jishi (積石山) in Tuyuhun territory, under the precedents that the great Han Dynasty generals Wei Qing and Huo Qubing had their tombs built in the shapes of mountains in Xiongnu territory to commemorate their victories, be constructed for Li Jing's wife (as Li Jing would eventually be buried there as well). In 643, when Emperor Taizong commissioned the Portraits at Lingyan Pavilion to commemorate the 24 great contributors to Tang rule, Li Jing's portrait was one of the 24.