Research direction: magnetosphere-ionosphere-thermosphere coupling research project of electric field and current system, field current, inner magnetosphere electric field, magnetospheric ionospheric substorm and magnetic storm in the middle and upper ionosphere 1.20 10 Natural Science Foundation general project "Observation and numerical simulation of polarization current in the sub-tail region" 2.2006 Youth Natural Science Foundation "Substorm current system and related magnetic tail dynamics"