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After his defeat, Zhang Han sent his deputy Sima Xin to Xianyang to ask for reinforcements and supplies. The eunuch Zhao Gao deceived the Qin emperor Qin Er Shi and falsely accused Zhang Han of military failure and conspiring with the rebels. The emperor dismissed Zhang's request. Zhao Gao even sent assassins to kill Sima Xin on his return journey, but Sima survived and escaped back to report to Zhang Han. Just as Zhang Han was in a dilemma whether to retreat or surrender, Xiang Yu's forces completely surrounded Zhang Han and prevented the Qin army from withdrawing. In dire straits, Zhang Han, along with his deputies Sima Xin and Dong Yi and his 200,000 men, eventually surrendered to Xiang Yu in the summer of 207 BC.