On　April　20,　2013,　the　Lushan　earthquake　(MS　7.0)　occurred　under　the　background　of　a　long-term　large　area　severe　drought　in　Southwestern　China　in　2009-2011,　as　a　typical　mid-term　anomalous　background.　We　delineated　the　annual　medium-term　forecast　earthquake　location,　and　the　actual　deviation　is　400　kilometers.　In　the　night　before　the　earthquake,　The　Special　Committee　for　Predicting　Natural　Disaster,　Chinese　Geophysical　Society　held　a　closed-door　discussion　on　the　danger　of　recent　domestic　earthquake,　especially　on　the　subject　of　the　danger　of　probable　occurrence　of　strong　earthquake　equal　or　over　MS　7.5　in　Chinese　mainland　and　the　surrounding　area　in　the　interval　of　10　days　around　the　date　of　April　27,　2013.　Three　hours　before　the　earthquake,　Chen　Weisheng　found　that　the　temperature　recording　curve　appeared　widespread　breakpoints.　In　addition,　The　Institute　of　Earthquake　Prediction,　Beijing　University　of　Technology　received　the　signal　of　the　abnormal　infrasound　four　days　before　the　earthquake.　From　Zhengzhou　back　to　Beijing　on　April　21,　2013,　the　author　was　able　to　verify　that　from　23:　00　on　April　18　to　08:　00　on　April　19,　2013　(Beijing　time),　the　pressure　chart　data　in　Korea　show　the　abnormal　low　pressure　area　covering　the　range　of　100　km,　including　30.3　degrees　north　latitude　and　103　degrees　east　longitude.　The　author　points　out　that　the　introspection　should　be　made　to　deeply　understand　that　science　is　the　communication　between　the　human　and　the　nature　and　that　we　should　study　the　earthquake　information　from　the　point　of　view　of　its　evolution.