북연
Later that year, Emperor Mingyuan of Northern Wei sent a messenger, Huniuyu Shimen (忽忸于什門), to try to negotiate peace with Northern Yan, but when Huniuyu arrived at Helong, he refused to enter the Northern Yan palace, demanding that Feng Ba come out of his palace and accept Emperor Mingyuan's edict (as a sign of submission). Feng Ba refused and dragged Huniuyu into the palace. Huniuyu refused to bow, and Feng Ba had his guards press Huniuyu's head down, and then imprisoned him. Later, on several occasions, Huniuyu insulted Feng Ba, but Feng Ba overruled suggestions to have him executed, stating that Huniuyu was just being faithful to his state. He later tried several times to have Huniuyu submit, but Huniuyu each time refused. Feng Ba, instead, entered into an alliance with the Xia emperor Helian Bobo.