Today, 90 years ago, on January 19th, 1935 (December 15th, 1934 in the lunar calendar), the Red Army left Zunyi and moved north. In 1935, the Zunyi Conference established a new correct leadership of the central government represented by Mao Zedong. On January 19th, the Red Army left Zunyi and moved north. A highly flexible mobile warfare policy was adopted, crossing Chishui River and entering southern Sichuan. In mid-February, he marched eastward, crossed Chishui River twice, attached importance to Zunyi, and annihilated 2 divisions and 8 regiments of the enemy. In mid-March, I crossed Chishui three times and entered Sichuan again. Subsequently, unexpectedly, he crossed the Chishui River four times and the Wujiang River south to attack Guiyang. When the enemy troops in Yunnan reinforced Guiyang, he went straight into Yunnan and threatened Kunming. Then it rushed northwest again. At the beginning of May, I cleverly crossed the Jinsha River, and finally completely jumped out of the encirclement surrounded by hundreds of thousands of enemy troops, and won a decisive victory in the strategic shift.