郭汜
In 195, Emperor Xian managed to escape from the generals Li Jue and Guo Si, who had been holding him hostage in Chang'an since 192, and return to the old imperial capital, Luoyang. Dong Cheng, Zhang Yang, Yang Feng, the White Wave Bandits and other loyalists came to protect the emperor from Li Jue and Guo Si, who attempted to capture him and bring him back to Chang'an.