The original text of "Heart Sea Agitates" is "How many times has it stirred in my heart", the previous sentence is "This pulse of plasma" and the next sentence is "Rolling up ten thousand waves", which comes from the poem "Crossing the Yellow River".
Crossing the Yellow River is a poem. When the author passed the Yellow River, he felt the magnificence of the Yellow River and the massiness of its history, which triggered a deep agitation. This poem expresses the author's love for the Yellow River and reverence for the national spirit by depicting the scenery and history of the Yellow River.