Helian Chang
After Helian Bobo's death in 425, Helian Ding's older brother Helian Chang (who had replaced Helian Gui as crown prince in 424) succeeded him. Helian Chang gave Helian Ding more authorities than before, and Helian Ding quickly became one of the major generals that his brother relied on. After rival Northern Wei's general Daxi Jin (達奚斤) captured the important city of Chang'an in 426, Helian Chang sent Helian Ding south in spring 427 from the capital Tongwan (統萬, in modern Yulin, Shaanxi) to try to capture Chang'an. He became stalemated with Daxi at Chang'an.