长征途中,张国焘密令红四方面军南下,毛泽东连夜率部北上。如何将张国焘的阴谋告知红四方面军总指挥徐向前?毛泽东写下亲笔信,曾思玉冒死折返去送信。1935年9月11日一大早,红二师师长陈光严肃地对曾思玉说:“曾主任,交给你一个极其重要、十分火急的任务。” On the way to the Long March, Zhang Guodong ordered the Red Fourth Army to go south, while Mao Zedong made his nightfall overnight. How to tell the conspiracy of Zhang Guofei Xu forward? Red Mao Zedong wrote a personal letter, had Sith Yu risked his death to send a letter. On the morning of September 11, 1935, Chen Guang, the commander of the Second Red Army Division, solemnly said to Zeng Siyu: “Once the director, you are given an extremely important and very urgent task.” "