[Method] The new method of flame atomic absorption spectrometry(FAAS) for determining Se content in Se-enriched tea in Ziyang area of Ankang city was established.

Precursor anomaly feature of dynamic pattern of groundwater level in Yunnan area;

Study on synthetical anomaly characteristics of short-term precursors of strong earthquakes in Yunnan area;

Then we calculated the VP/VS ratio of the Yunnan area and analyzed its regional distribution characteristics.

An integrated study of geological structural characteristics, granite petrology and time_space distribution regularity of deposits indicates that the Mesozoic lithosphere of Yunkai area experienced three tectonic evolution phases: the collision between 201 and 277 Ma, the tectonic transformation from compression to extension between 154 and 160 Ma, and the extension between 80 and 100 Ma.

The Sedimentary chert formation (Sinian D fromation) at the top of the Precambrian in Yunkai area,western Guangdong and southeastern Guangxi displays banded,lamellated,massive and pseudobrecciated structures.

It is the age of the isobaric cooling event of static recrystallized carbonate minerals in marble post deformation, reflecting approximately the age of metamorphism and deformation after the hydrothermal deposition in late Neo Proterozoic in the Yunkai area.

The Spatial-temporal Characteristics of Continuous Occurrence of Mid-strong Earthquakes and Its Modulation Ratio in Yunnan Area;

The spatial and temporal distribution of focal depth before strong shocks in Yunnan;

Analysis of the Characteristics of Source Precursor and Field Precursor of Groundwater in Yunnan;

Study on velocity ratio(V_p/V_s) anomaly of earthquake sequences in Yunnan region;

Analysis of teleseimically trigged seismicity in Yunnan region under influence of the Indonesia large earthquakes with M8.7 and M8.5;

The Characteristics of Short-term and Impending Seismic Anoma ly before Strong Earthquakes in Yunnan Region;