The Yalu River originates from the southern foot of Changbai Mountain and flows through Changbai, Linjiang, Kuandian, Dandong and other places into the Yellow Sea. It is the boundary river between China and North Korea. Seventy years ago, the outstanding sons and daughters of the Chinese nation crossed this border one after another and embarked on a foreign battlefield where they fought against the "United Nations Army" headed by the United States.

This episode mainly introduces that after the Party Central Committee made the decision to send troops to North Korea, even though the Soviet Union gave up air cover, the Party Central Committee still decided to send troops to North Korea on time. When the United Nations army marched northward, the Eight Immortals of the various ministries of the Volunteer Army marched across the sea to show their magical powers. Without the U.S. military noticing, volunteers crossed the Yalu River and secretly entered North Korea, opening the curtain of the War to Resist U.S. Aggression and Aid Korea.