1927 arrived in Sanwan Village on September 29th. On the night of entering the village, Mao Zedong held an enlarged meeting of the former enemy committee of the Communist Party of China in the "Taihe Lane" grocery store to discuss the current situation and solutions of the troops and decided to reorganize and reorganize the troops. This is the famous adaptation of three bays.

The main contents of Sanwan's adaptation are as follows: First, the army was reduced from a division to a regiment, called the Revolutionary Army of Workers and Peasants 1 Army 1 Division 1 Regiment, headed by Chen Hao, which effectively abolished Yu Sadu's command of the army (Yu Sadu was pessimistic about the revolutionary future at this time and then defected), with two battalions and more than 700 guns; At the time of adaptation, Mao Zedong announced that he was willing to stay, and those who were willing to go paid for the trip, and those who were willing to come back were also welcome in the future. Second, a democratic system is implemented within the military, and officers and men are equal and treated equally. It is stipulated that soldiers are not allowed to beat and scold, and soldiers have the freedom to speak at meetings. Soldiers' committees are established at or above the company level. Soldiers' committees have great power to participate in the administrative and economic management of the troops, and officers should be supervised by them. Third, the most important measure in the reorganization is to establish a party branch in the company. When the Nanchang Uprising and the Autumn Harvest Uprising on the Hunan-Jiangxi border broke out, the Party organization in the army was established on the basis of regiments. The rebels fought bravely and went through hardships. However, the party's organizational system is not rooted at the grassroots level, and it is difficult to effectively master soldiers and troops. In order to change this situation, Mao Zedong decided to establish party organizations at all levels in the army: the class and platoon set up party groups, the company set up party branches, and the battalion and regiment set up party committees; Party representatives at or above the company level shall be appointed by the party organization secretary at the same level; The whole army is under the unified leadership of the party's former enemy Committee. All major issues of the army must be discussed and decided by the party organizations collectively.