Jin forces quickly captured Later Qin's major city Luoyang and then headed toward the Later Qin capital Chang'an. In spring 417, The Later Qin emperor Yao Hong (Yao Xing's son) requested emergency assistance. Emperor Mingyuan summoned his council to consider whether to launch armies to try to stop Jin advances to try to save Later Qin. Most of his advisors, apprehensive at whether Liu Yu actually intended to attack Northern Wei as well, suggested that Emperor Mingyuan try to intercept Liu Yu's forces. However, Cui Hao opined that this would precisely make Northern Wei the target of Jin attacks, and Emperor Mingyuan partially agreed, but still sent some 100,000 men, commanded by Baba Song, to guard the northern bank of the Yellow River to prepare for battle. If a Jin ship were blown by the wind to the northern bank, Northern Wei forces would seize the ship and kill or capture its crew, and when Jin forces then landed on the northern banks, Northern Wei forces would temporarily retreat, and then re-establish the northern bank defensive posture as soon as Jin forces reboarded their ships. Angry at this harassment, Liu Yu sent his general Ding Wu (丁旿) to land on the northern bank and deal Northern Wei forces a major defeat. This ended Emperor Mingyuan's attempts to save Later Qin, and there were no further Jin/Northern Wei battles throughout the campaign, as while Emperor Mingyuan still planned to cut off Liu Yu's path if he were stopped by Later Qin forces, Liu Yu was able to capture Chang'an and destroy Later Qin by fall 417, and Emperor Mingyuan's planned attacks never materialized. Many former Jin officials who opposed Liu Yu who had taken refuge with Later Qin fled to Northern Wei, and Emperor Mingyuan further ordered that anyone who could save and deliver members of the Yao imperial clan to Pingcheng would be greatly rewarded. (How effectively this order was is not known, and most members of the Yao clan were captured and killed by Liu Yu.)