What is the theme of Yunnan geographical research?

1. Topography: Study the landform features of mountains, plateaus, rivers and lakes in Yunnan, and explore their formation and evolution mechanism.

2. Climate and Meteorology: Study the climate characteristics, monsoon system, precipitation distribution and other meteorological factors in Yunnan, including climate change and climate prediction.

3. Natural resources and environment: study Yunnan's natural resources such as mineral resources, water resources, forest resources and biodiversity, as well as environmental problems such as soil erosion and water pollution.