The Central Red Army arrived at Hadapu, Gansu during its long march. Mao Zedong discovered news about the Northern Shaanxi Red Army from the newspapers and learned about Liu Zhidan's situation from others. Before leaving, Mao Zedong convened a meeting and decided to abandon the course of action determined by the Russian Border Conference and continue heading north to northern Shaanxi to find Liu Zhidan's Shaanxi-Gansu Red Army.
On October 1, 1935, the 15th Red Army launched the Battle of Laoshan in the Laoshan area of Ganquan County and annihilated the main force of the enemy's 110th Division. This was the first victory after the establishment of the 15th Red Army. In order to welcome the Central Red Army The arrival created favorable conditions. Liu Zhidan, who was in charge of serving as deputy army commander and chief of staff, went back and told Xi Zhongxun the great news. The captured officers revealed that there was a Red Army team of tens of thousands, suspected to be the Central Red Army. To this end, the two discussed making preparations for food, grass and houses, especially propaganda work among the masses in the enemy-occupied areas of Longdong, to welcome the Central Red Army to the Shaanxi-Gansu base area.
Fang Yijiang has been on standby since he was suspended from his post during the land investigation. Recently, the Central Committee established the Political Security Bureau, and his superiors appointed Fang Yijiang as the interrogation section chief to assist Gu Lin in carrying out erroneous "elimination of counterrevolutionaries" against the party, government and military agencies in the Shaanxi-Gansu District. . Gu Lin hated Xi Zhongxun and others extremely, and believed that they were enemy agents planted in the party organization. He not only suspended Liu Zhidan and Xi Zhongxun from their posts, but also transferred many senior cadres to be investigated in Xi Zhongxun's name.
Because the enemy's encirclement and suppression was not over yet, Liu Zhidan asked the guerrilla leader Zhang Mingke to cooperate with the main force before he was arrested. Xi Zhongxun and others also faced interrogation under this situation. The situation in the Shaanxi-Gansu Soviet Area was critical. Without any evidence, Gu Lin directly labeled Liu Zhidan and Xi Zhongxun as traitors, and even determined that Xi Zhongxun was a counterrevolutionary who had infiltrated the revolution, without giving him any chance to explain.
Zhu Lie was framed as a traitor and tortured, which made Xi Zhongxun furious but powerless. Liu Zhidan, Xi Zhongxun, Chu Lie and others were imprisoned. They lamented that they risked their lives for the country and the people, but in the end they were accused of unwarranted charges. In despair, Liu Zhidan encouraged everyone to believe in the party. Everyone sang folk songs and looked out the window, believing that one day the dawn would come.
In late October 1935, Mao Zedong and others led the Shaanxi-Gansu detachment to Wuqi in northern Shaanxi. They were warmly welcomed by the local people and promptly stopped the erroneous "elimination of counterrevolutionaries." Li Weihan, the director of the local work department of the Red Army, was ordered to announce the suspension of Gu Lin and others for review, and released Liu Zhidan, Xi Zhongxun and others without charge. Although everyone saw the light of day again, Qin Lie had been shot by Gu Lin and the others earlier, which became the biggest pain in the hearts of everyone present. Qin Mulan collapsed to the ground and cried loudly.
In February of the following year, Liu Zhidan became the army commander and led the 28th Army to the east with political commissar Song Renqiong. Xi Zhongxun hurriedly came to see Liu Zhidan and revealed to him that many comrades had died unjustly during the counter-revolutionary campaign. Liu Zhidan felt uncomfortable and could only comfort him to cheer up and believe that this kind of ideological deviation would be unified in the future.
Liu Zhidan took this opportunity to express his feelings to Xi Zhongxun, and the two also said goodbye at the intersection and agreed to meet again in the future. On the way to the Eastern Expedition, the 28th Army was ambushed by the enemy and had no choice but to rush forward. Liu Zhidan lay on the hillside and watched the front, risking his life to inform the front of the location of the enemy's headquarters, and he would take it down no matter what. Gunfire exploded around Liu Zhidan, and everyone else was worried about Liu Zhidan's safety.