Introduction to the assembly square: The five red stars in the middle of the assembly square represent the first and second columns of the Red Star, and the five red steel structures surrounding it represent the first, third, and third columns of the Central Red Army. The fifth, eighth and ninth regiments. It symbolizes that the two columns composed of central government officials and the five legions of the Central Red Army gathered on the north bank of the Du River, rested and replenished, and crossed the Du River to start the Long March. The laid scroll is engraved with a description of the Central Red Army's strategic shift and departure for the Long March from the "History of the Communist Party of China": On October 16, all units were assembled in the area north of the Yudu River. Beginning on the 17th, the five main legions of the Central Red Army, as well as more than 86,000 people from the central and military commission agencies and directly affiliated troops, embarked on a journey of strategic transfer and began the famous Long March.