Zhang Zuo
After becoming regent, Zhang Yong became arrogant, sexually immoral, and dictatorial, and he often executed officials, causing the nobles and the officials to be fearful. Zhang Tianxi's assistants Liu Su (), comparing Zhang Yong to Zhang Zuo, persuaded him that he needed to act against Zhang Yong, and later in 361, Zhang Tianxi had Liu Su and another assistant, Zhao Baiju () attempt to assassinate Zhang Yong, but failed. Zhang Yong then gathered his troops and attacked Zhang Tianxi, but Zhang Tianxi persuaded Zhang Yong's troops that he was avenging the Song clan and that Zhang Yong's next move was going to slaughter the royal Zhang clan. Zhang's forces, hearing this, abandoned him, and Zhang Yong committed suicide. His clan was slaughtered, and Zhang Tianxi became sole regent. Zhang Tianxi ended the practice of using Emperor Min of Jin's era name "Jianxing" and instead started using the current era name of Jin Dynasty (at the time, Emperor Ai's "Shengping"), to show even greater affinity with Jin.