Wuwei, Gansu
Zhang Guan governed with a heavy hand, based on his own whim. In 359, he became suspicious of Song Hun and wanted to kill him and his brother Song Cheng (), and then depose Zhang Xuanjing and take the throne himself. Song Hun received news of this, however, and started an uprising within the capital Guzang (姑臧, in modern Wuwei, Gansu). Song's and Zhang Guan's forces battled within the city, but eventually Song prevailed, and Zhang Guan and his brother Zhang Ju () committed suicide. Their clan was slaughtered. Song Hun became regent.