Helian Bobo
In 416, with Later Qin, now under the rule of Yao Xing's son Yao Hong, under a major attack by the Jin general Liu Yu, Helian Bobo believed that Later Qin would fall to Jin, but that Jin would not be easily able to hold Later Qin's capital region -- Guanzhong. He therefore intensified his own attacks on Later Qin as well, and preparing to use the opportunity of Later Qin's destruction to seize more territory. As Later Qin neared destruction, Helian Bobo seized its western territory, centering Anding (安定, in modern Pingliang, Gansu), and then prepared for an eventual confrontation with Jin forces, which destroyed Later Qin in 417 and captured its capital Chang'an.