 Sima, the governor of Xun Province (勛州, roughly modern Xiaogan, Hubei) and the nine surrounding provinces, soon surrendered to Chen, seeking Chen aid.Emperor Xuan sent the generals Fan Yi (樊毅), Ren Zhong (任忠), and Chen Huiji (陳慧紀) to attack Northern Zhou's southern provinces to aid Sima, whom he created the Duke of Sui.However, Wei Xiaokuan quickly defeated Yuchi, forcing Yuchi to commit suicide, and Sima's own forces collapsed.