2. Taking this as a breakthrough point, the reasons of frequent earthquakes in China are cut in. It is not difficult to write "geology (disaster)". Earthquakes are only one aspect of geological disasters. There are many reasons for the formation of earthquakes: (1) Generally speaking, it is plate movement. Wenchuan earthquake belongs to the collision and compression of Asia-Europe plate and Indian Ocean plate, while Tangshan earthquake is the compression of Pacific plate and Asia-Europe plate. They belong to different seismic zones (there are many earthquakes at the junction of plates). (2) From a small scale, China is a country with vast mountainous areas, unstable geological structure and serious earthquake disasters. But also accompanied by other geological disasters, such as landslides and mudslides.
3. You can check the books such as Geology of China, National Geographic and Earthquake (Cause). Papers can be collected on websites such as CNKI.
4. In terms of data and pictures, we can collect data (pictures), geological structures or regional distribution (data) maps of plate boundaries in earthquake-prone areas in China in the past hundred years, and it is better to find combined data, which is more convincing.