 He notified Wang that the Xia forces were on the way, and also wrote Li Shimin to again request Li Shimin to withdraw and return the seized land to Zheng.When Li Shimin discussed this proposal with his generals, most believed that they should avoid Dou, but Guo Xiaoke () disagreed, believing that this was a good chance to destroy both Wang and Dou.He suggested for Li Shimin to proceed to Hulao Pass, east of Luoyang, and defend it against the coming Dou attack.