Introduction to the picturesque military flag: The Second Jiangsu Provincial Congress of the Communist Party of China was held in Shanghai from November 18 to 26, 1929. Zhou Enlai, Chen Yun, Li Shuoxun, Li Fuchun, Li Weihan and other comrades participated. One of the important contents of the meeting was the decision to build a military base in northern Jiangsu. The 14th Red Army was established.