What does Liu Hulan mainly play in the movie?

The movie Liu Hulan tells the story of the revolutionary martyr Liu Hulan. The main plot of the movie is as follows:

In 1941, the Anti-Japanese War entered a difficult stalemate stage. The Japanese occupied Yunzhouxi Village, Liu Hulan's hometown, and established an Anti-Japanese and National Salvation Children's Corps in the village, with Liu Hulan as the leader. After the victory of the Anti-Japanese War, the Kuomintang launched a civil war, and white terror enveloped the land of China. Liu Hulan was sent back to Yunzhou West Village to carry out work. She actively organized the masses to deliver public rations, make military shoes, collect military shoes from house to house, support the front line, detect the enemy's situation and eliminate bullies, and took good care of the injured County Magistrate Gu.

In 1947, Liu Hulan was arrested due to betrayal by a traitor. Yan Ya, an officer with a big beard, threatened and lured Liu Hulan in every possible way, asking Liu Hulan to reveal the situation of the underground party organization and promise not to work for the Communist Party again, but Liu Hulan said firmly: "Even if you give me a gold mountain, I will not confess to the enemy!" Threatening her with death, she said resolutely: "I'm afraid of dying and not joining the Communist Party!" Zhang Dabeard became so angry that he killed six village cadres with a guillotine in front of Liu Hulan in an attempt to make Liu Hulan surrender. Hu Lan asked contemptuously: "How will I die?" Then he walked calmly and firmly towards the guillotine, ending his life at the age of 15. Chairman Mao wrote an inscription for Liu Hulan: "Great life, glorious death!"