Hello! To write a paper on the history of modern and contemporary literature in China, we should grasp the following important topics:

1. Writers: Lu Xun, Guo Moruo, Mao Dun, etc.

2. Literary genre: silk, crescent moon, local culture, etc.

3. Literary Debate: Problems and Doctrine, Revolutionary Literature, National Defense Literature, etc.

4. Cultural movement: The new cultural movement is the most important.

Remember the above correctly, and you are sure to pass the exam. Of course, we can't forget "Speech at Yan 'an Forum on Literature and Art" and its spirit of "two acts".