SFTSV belongs to the genus of phlebovirus in the family of Bunyaviridae. The viruses are spherical or ellipsoidal particles with a diameter of 80–100 nm, which is enveloped by double-layered lipid membrane. The particle has spines of glycoproteins on the surface and the nucleocapsids composed by viral genome and nucleoproteins inside. The viral genome carries three single- and negative- stranded RNA segments, namely, large (L), medium (M), and small (S). The L segment contains 6,368 nucleotides, with open reading frame to encode RNA-dependent RNA polymerase. The M segment contains 3,378 nucleotides, with a single reading frame to encode glycoprotein precursors with 1,073 amino acids. The S segment contains 1,744 nucleotides, with ambisense RNA. The genome of this segment encodes two proteins, the viral nucleoprotein and the nonstructural protein, in both directions. The terminal sequence of the virus genome is highly conserved, with possible formation of panhandle-shaped structure which is highly similar to the features of other phleboviruses at the terminal complementary sequence. The currently existing bunyaviruses have a weak resistance, which are acid intolerant and can be quickly inactivated by heat, diethyl ether, deoxysodium cholate, commonly used disinfectants, and ultraviolet rays. These types of viruses can be completely inactivated by exposure to diethyl ether at 4 °C for 24 h, heat at 65 °C for 30 min, or boiling water at 100 °C for above 2 min. Exposure to ethanol at a concentration of 75 % for 5 min can inactivate the virus, while exposure to chlorine disinfectant containing 10 % effective chlorine for 5 min can inactivate the virus. It has been preliminarily proved that the virus can be inactivated completely by exposure to β-propiolactone at 4 °C for 24 h or to methyl alcohol at 4 °C for 7 days.