The U.S. stock market crashed in October 1929, and the Western powers fell into an economic crisis. They were indifferent to the potential war crisis in the Far East. The Japanese military believed that the Western society was overwhelmed and it was the best time for them to invade China, so they brazenly planned the September 18th Incident. The outstanding young people represented by Lu Ming fought bravely without fear of sacrifice in order to realize the great cause of national independence and national liberation. They grew from nationalists to communist fighters and realized their ideal of serving the country through hardships and twists.