1935年，红军需要渡过大渡河。
大渡河（藏语称“杰莫恩古曲”）是一条主要河流，位于中国西南部的四川省。大渡河从青藏高原东部流出，进入四川盆地，并在那里汇入岷江——长江的一条支流。
During the Long March, the Red Army—hemmed in by enemy forces blocking their path ahead and pursuing them from behind—found themselves amidst the mountains between the Jinsha and Dadu Rivers. Chiang Kai-shek had massed tens of thousands of troops, preparing for a decisive battle and hoping to see Mao Zedong meet the same fate as Shi Dakai—a historical figure who suffered a catastrophic defeat in the same region. Faced with a perilous situation and an omnipresent enemy, senior Red Army leaders—including Mao Zedong (played by Han Shi), Zhou Enlai (Zhao Shenqiu), Zhu De (Liu Huaizheng), and Liu Bocheng (Fu Xuecheng)—remained undaunted. They devised an urgent operational plan: a feint attack on Dashupu, coupled with a covert crossing of the Dadu River at Anshunchang. Seventeen brave soldiers spearheaded the crossing of the Dadu River, while another detachment executed a lightning-fast seizure of the Luding Bridge. Chiang Kai-shek immediately adjusted his strategy, attempting to isolate and annihilate the Red Army forces that had crossed the river. Mao Zedong, however, turned the situation to his advantage by splitting his forces into several columns to mislead the enemy. By the time Chiang realized the ruse and ordered the Sichuan warlord troops under He Xianghui (Li Ning) to reinforce Luding, the Red Army had already captured and secured the bridge. When Chiang sent a telegram demanding an update on the defense of the bridge, it was already too late...
