Yelü Bei
After this failed campaign, Lu and another Han officer who surrendered to Khitan, Wang Yu (), returned to their routines of guiding Khitan soldiers in harassing Jin's northern borders, causing much worries for Li Cunxu in his resumed campaign against Later Liang. Despite this and other difficulties, however, he was able to capture Later Liang's capital Daliang in a surprise attack in 923. Zhu committed suicide as Daliang fell, ending Later Liang and allowing Li Cunxu to take over its territory as the emperor of a new Later Tang. In light of the Later Tang victory, Khitan did not relent in its pressure, and continued yearly raids against Later Tang, and further demanded that Li Cunxu cede Lulong so that it could be given to Lu; Li Cunxu refused. When Emperor Taizu later that year decided to try to conquer Khitan's eastern neighbor Balhae, he left Lu and the Xi chieftain Tunei () on guard on the Later Tang borders to ward against a potential Later Tang attack, although he was unable to conquer Balhae at that time. (He was eventually able to in 926, and bestowed Balhae lands on his oldest son Yelü Bei.)