In order to change the situation on the Eastern Front, on October 31, Mao Zedong sent a telegram to the East China Military Region: the 9th Corps will start on November 1st, and one army will be activated first, and the other two armies will be activated without interruption. After arriving in the theater, under the command of the Volunteer Army Command, the goal was to find opportunities on the Eastern Front to annihilate the South Korean Army's Capital Division, 3rd Division, 1st US Marine Division, and 7th Infantry Division.