Write the process of this activity in 600 words in the composition "the activity of making friends"

The day before Tomb-Sweeping Day's arrival, all the teachers and students took part in a very meaningful activity-going to the Martyrs' Cemetery to sweep the graves. The students dressed in neat school uniforms and bright red scarves, each holding an elaborate small white flower, lined up solemnly under the high monument. In the majestic national anthem, they listened to the touching story of the Red Army's bloody battle told by the old Red Army grandfather. ...

Through this vivid education class, in my young mind, I gradually understood the greatness and selflessness of the Red Army. The Red Army is my hero. In the long revolutionary war years, I don't know how many heroic unsung heroes died on the battlefield. They gave their youth, blood and even precious lives for the motherland, the people and today's happy life. Wang Erxiao, the little hero, is a children's league member. In order to destroy the invaders, cover the rear organs and thousands of villagers, pretend to lead the way and lead the enemy into the ambush circle of the Eighth Route Army. When the enemy was hit, he knew he had been cheated, so he killed Wang Erxiao. Wang Erxiao is just one of thousands of martyrs in War of Resistance against Japanese Aggression, Qian Qian. It is precisely because of the bloody sacrifice of these revolutionary martyrs that we have a happy life today.