diff --git a/src/data/pointcalculate.cpp b/src/data/pointcalculate.cpp
index a2ecc53..8a36033 100644
--- a/src/data/pointcalculate.cpp
+++ b/src/data/pointcalculate.cpp
@@ -251,8 +251,10 @@ float PointCalculate::calculateArea() {
     /*
      * H = K * S / w;
      */
-    float coefficient = 0.0f;
+    float coefficient = ConfigHandler::_configMap[ConInstrumentCoefficientStr].toFloat();
     if(Global::_enthalpyCoefficientEnableFlag){
+        logde<<"_enthalpyCoefficientEnableFlag...";
+
         float startTemp = _leftSelectedPoint.x();
 
         float value1 = Global::_enthalpyCoefficientVtr.at(0);
@@ -262,9 +264,6 @@ float PointCalculate::calculateArea() {
         coefficient = value1 * startTemp * startTemp +
                 value2 * startTemp +
                 value3;
-
-    }else{
-        coefficient = ConfigHandler::_configMap[ConInstrumentCoefficientStr].toFloat();
     }
 
     logde<<"coefficient:"<<coefficient;
diff --git a/src/ui/centralwidget.cpp b/src/ui/centralwidget.cpp
index 1152592..a120b4d 100644
--- a/src/ui/centralwidget.cpp
+++ b/src/ui/centralwidget.cpp
@@ -628,18 +628,11 @@ void CentralWidget::clearData(const CentralWidget::ClearDataMode mode)
         _line2->setVisible(false);
     }
 
-#if 0
-    // Clear filled area.
-    if(_currentGraph){
-        _currentGraph->setBrush(QBrush(Qt::transparent));
-    }
-
+#if 1
     // Clear graph on plot.
     for (int i = _customPlot->graphCount() - 1; i >= 0; --i) {
         QCPGraph *graph = _customPlot->graph(i);
-        if (graph != _currentGraph) {
             _customPlot->removeGraph(graph);
-        }
     }
 #endif
 
diff --git a/src/ui/coefficientselectionform.cpp b/src/ui/coefficientselectionform.cpp
index d326881..4f24051 100644
--- a/src/ui/coefficientselectionform.cpp
+++ b/src/ui/coefficientselectionform.cpp
@@ -35,6 +35,11 @@ CoefficientSelectionForm::~CoefficientSelectionForm()
     delete ui;
 }
 
+void CoefficientSelectionForm::showEvent(QShowEvent *event)
+{
+
+}
+
 void CoefficientSelectionForm::on_pushButtonCalculate_clicked()
 {
     float theory = ui->LineEditTheory->text().toFloat();
@@ -70,17 +75,20 @@ void CoefficientSelectionForm::on_pushButtonConfirm_clicked()
             <<coeff[1]<<","
            <<coeff[2];
 
-        Global::_enthalpyCoefficientEnableFlag = false;
+        Global::_enthalpyCoefficientEnableFlag = true;
 
         Global::_enthalpyCoefficientVtr.clear();
         Global::_enthalpyCoefficientVtr.push_back(coeff[2]);
         Global::_enthalpyCoefficientVtr.push_back(coeff[1]);
         Global::_enthalpyCoefficientVtr.push_back(coeff[0]);
     }
+
+    hide();
 }
 
 void CoefficientSelectionForm::on_pushButtonExit_clicked()
 {
+#if 0
     ui->LineEditTheory->clear();
     ui->LineEditCoefficient->clear();
 
@@ -88,6 +96,7 @@ void CoefficientSelectionForm::on_pushButtonExit_clicked()
     ui->textEditFileContent->clear();
 
     _jsonStr.clear();
+#endif
 
     hide();
 }
@@ -116,6 +125,7 @@ void CoefficientSelectionForm::on_pushButtonSelectFile_clicked()
     //
     ui->labelFilePath->setText(filePath);
     ui->textEditFileContent->setText(_jsonStr);
+
 }
 
 void CoefficientSelectionForm::on_radioButtonSinglePointCoefficient_toggled(bool checked)
diff --git a/src/ui/coefficientselectionform.h b/src/ui/coefficientselectionform.h
index 08fb3b4..c5ae511 100644
--- a/src/ui/coefficientselectionform.h
+++ b/src/ui/coefficientselectionform.h
@@ -14,7 +14,8 @@ class CoefficientSelectionForm : public QWidget
 public:
     explicit CoefficientSelectionForm(QWidget *parent = nullptr);
     ~CoefficientSelectionForm();
-
+protected:
+    void showEvent(QShowEvent *event);
 private slots:
     void on_radioButtonSinglePointCoefficient_toggled(bool checked);
     void on_radioButtonMultiPointCoefficient_toggled(bool checked);