How to write 300 words in the composition "Remembering the Ancestors"?

Remember one's ancestors

Tomb-Sweeping Day is a day for us to remember our ancestors and martyrs. This afternoon, all the fifth-grade teachers and students of our school came to Dongshan Revolutionary Martyrs Cemetery with a very heavy heart to remember the revolutionary martyrs who died heroically for the liberation of the motherland and pay tribute to their great achievements. Walking into the cemetery, you can see the monument to revolutionary heroes standing tall on the top of Dongshan Mountain in the distance. On the tablet, the eight golden characters "Revolutionary Martyrs are immortal" shine in the sun. Climbing the long stone steps, we came to the Monument to Heroes. Murals of heroic battles of revolutionary martyrs are carved around the monument, which records the glorious deeds of revolutionary martyrs. Under the solemn monument, we held an oath ceremony for the bright team flag. All the teachers and students observed a three-minute silence for the revolutionary martyrs. At that moment, I thought a lot: our beautiful and happy life today was created for us by the revolutionary martyrs. I must study hard and serve my country in the future. Later, we presented little white flowers to the revolutionary martyrs. Rest in peace, martyrs. We will miss you forever. Finally, I visited the Revolutionary Martyrs Memorial Hall, which contains the relics of revolutionary martyrs and the introduction of heroic events. This grave-sweeping activity gave us a good patriotic education.