Introduction to "Long March Song": Engraved on the right side of the monument fence is the first song in the "Long March Song" written by Comrade Lu Dingyi, the first director of the Propaganda Department of the Central Committee after liberation, during the Long March: "October The autumn breeze is coming, the Central Red Army is busy on the expedition. The Central Red Army crossed the Duhe River at night and won the battle in Gupi Xintian. "This poem is a true portrayal of the Central Red Army crossing the Duhe River at night and embarking on a long journey.