diff --git a/src/budget/_category.py b/src/budget/_category.py
index 921ac4f..83b8939 100644
--- a/src/budget/_category.py
+++ b/src/budget/_category.py
@@ -28,9 +28,9 @@ class CategoryTab(TabPage):
         topLayout.addWidget(self.categoryAddButton)
 
         # 创建表格
-        self.accountTable = QTableWidget()
+        self.categoryTable = QTableWidget()
         tableLayout = QVBoxLayout()
-        tableLayout.addWidget(self.accountTable)
+        tableLayout.addWidget(self.categoryTable)
 
         # 应用布局
         categoryLayout = QVBoxLayout()
diff --git a/src/budget/_hook.py b/src/budget/_hook.py
deleted file mode 100644
index 60e2bc6..0000000
--- a/src/budget/_hook.py
+++ /dev/null
@@ -1,2 +0,0 @@
-from PyQt6.QtWidgets import *
-from PyQt6.QtCore import *
diff --git a/src/budget/_mw.py b/src/budget/_mw.py
index 0cd12b4..41352c2 100644
--- a/src/budget/_mw.py
+++ b/src/budget/_mw.py
@@ -9,7 +9,7 @@ from ._stat import StatTab
 def initUI(self):
 
     self.setWindowTitle('budget')
-    self.setMinimumSize(800, 400)
+    self.setMinimumSize(800, 600)
 
     self.pg = PostgresTab()
     self.categoryTab = CategoryTab(self)
diff --git a/src/budget/_stat.py b/src/budget/_stat.py
index 8447ec3..1dd765b 100644
--- a/src/budget/_stat.py
+++ b/src/budget/_stat.py
@@ -1,7 +1,9 @@
 from PyQt6.QtWidgets import *
+from PyQt6.QtCharts import *
 from ._tab import TabPage
 from ._pg import PostgresTab
 from PyQt6.QtGui import QDoubleValidator
+import datetime
 import json
 
 class StatTab(TabPage):
@@ -9,10 +11,73 @@ class StatTab(TabPage):
         super().__init__()
         self.initUI()
         self.pg = parent.pg
-        self.rows = []
 
     def initUI(self):
+        # 按钮
+        self.outButton = QPushButton('Expense')
+        self.inButton = QPushButton('Income')
+        buttonLayout = QHBoxLayout()
+        buttonLayout.addWidget(self.outButton)
+        buttonLayout.addWidget(self.inButton)
+
+        # 饼状图
+        self.chart = QChart()
+        self.chart.setTitle('Month Statistics')
+        self.chart.setAnimationOptions(QChart.AnimationOption.SeriesAnimations)
+        chartLayout = QVBoxLayout()
+        chartLayout.addWidget(QChartView(self.chart))
+
+        leftLayout = QVBoxLayout()
+        leftLayout.addLayout(buttonLayout)
+        leftLayout.addLayout(chartLayout)
+
+        # 日历控件
+        self.calendar = QCalendarWidget()
+        self.calendar.setGridVisible(True)
+        # 日历点击事件
+        self.calendar.clicked.connect(self.onCalendarClicked)
+        # 切换月份事件
+        self.calendar.currentPageChanged.connect(self.onCalendarPageChanged)
+
+        calenderLayout = QHBoxLayout()
+        calenderLayout.addWidget(self.calendar)
+
+        statLayout = QHBoxLayout()
+        statLayout.addLayout(leftLayout)
+        statLayout.addLayout(calenderLayout)
+        self.setLayout(statLayout)
+
+
+
+    def onCalendarClicked(self, date):
         pass
 
-    def onXXXClicked(self):
-        pass
+
+    def onCalendarPageChanged(self, year, month):
+        print(year, month)
+
+        # 合计分类的交易量
+        self.pg.execute("SELECT c_id, sum(amount)::numeric::float8 FROM transaction WHERE c_id IS NOT NULL and \
+             time BETWEEN %s AND %s GROUP BY c_id ORDER BY c_id", \
+            (datetime.date(year, month, 1), datetime.date(year, month+1, 1),))
+        self.statData = self.pg.fetchall()
+        print(self.statData)
+
+        # 获取此月所有交易类别
+        self.pg.execute("SELECT c_id, meta->>'name' FROM category \
+        WHERE c_id in (SELECT c_id FROM transaction WHERE time between %s and %s GROUP BY c_id) \
+        ORDER BY c_id", \
+                        (datetime.date(year, month, 1), datetime.date(year, month+1, 1),))
+        self.categoryData = self.pg.fetchall()
+        print(self.categoryData)
+
+        # 填充饼状图
+        self.chart.removeAllSeries()
+        series = QPieSeries()
+        for i in range(len(self.statData)):
+            series.append(self.categoryData[i][1], self.statData[i][1])
+        self.chart.addSeries(series)  
+
+    def selected(self):
+        # 刷新图表
+        self.onCalendarPageChanged(self.calendar.yearShown(), self.calendar.monthShown())
diff --git a/src/budget/_trans.py b/src/budget/_trans.py
index d5ccf5f..a4b2453 100644
--- a/src/budget/_trans.py
+++ b/src/budget/_trans.py
@@ -10,7 +10,6 @@ class TransTab(TabPage):
         super().__init__()
         self.initUI()
         self.pg = parent.pg
-        self.rows = []
 
     def initUI(self):
         # 创建顶部控件
@@ -124,7 +123,104 @@ class TransTab(TabPage):
                 QMessageBox.critical(self, 'Error', str(e))
 
     def onTransModifyClicked(self):
-        pass
+        # 获取当前选择的行
+        self.rows = self.transTable.selectionModel().selectedRows()
+        if len(self.rows) == 0:
+            QMessageBox.critical(self, 'Error', 'No row selected')
+            return
+        
+        # 创建修改数据对话框
+        self.tDialog = QDialog(self)
+        self.tDialog.setWindowTitle('Modify Transaction')# 时间 金额 描述
+        timeLabel=QLabel("Time:")
+        timeLine=QLineEdit()
+        timeLine.setText(self.transData[self.rows[0].row()][4].strftime("%Y-%m-%d %H:%M:%S"))
+        
+        amountLabel = QLabel("Amount:")
+        amountLine = QLineEdit()
+        num = self.transData[self.rows[0].row()][5]
+        # 去掉￥符号,考虑负值
+        if num[0] == '-':
+            num = num[2:]
+            num = '-' + num
+        else:
+            num = num[1:]
+
+
+        amountLine.setText(num)
+        # 只允许输入两位小数
+        amountLine.setValidator(QDoubleValidator(0.00, 999999999.99, 2))
+
+        descriptionLabel = QLabel("Description:")
+        descriptionLine = QLineEdit()
+        descriptionLine.setText(self.transData[self.rows[0].row()][6])
+
+        cButton = QPushButton("Confirm")
+        aButton = QPushButton("Abort")
+        buttonLayout = QHBoxLayout()
+        buttonLayout.addWidget(cButton)
+        buttonLayout.addWidget(aButton)
+
+        cButton.clicked.connect(self.tDialog.accept)
+        aButton.clicked.connect(self.tDialog.reject)
+
+        self.dialogLayout = QFormLayout()
+        self.dialogLayout.addRow(timeLabel, timeLine)
+        self.dialogLayout.addRow(amountLabel, amountLine)
+        self.dialogLayout.addRow(descriptionLabel, descriptionLine)
+        self.dialogLayout.addRow(buttonLayout)
+        self.dialogLayout.setSpacing(12)
+        self.dialogLayout.setContentsMargins(15, 15, 15, 15)
+
+        self.tDialog.setMinimumWidth(400)
+        self.tDialog.setLayout(self.dialogLayout)
+
+        if self.tDialog.exec() == QDialog.DialogCode.Accepted:
+            try:
+                # 若修改金额，则修改账户余额
+                if num != amountLine.text():
+                    amount = float(amountLine.text())
+                    amount = amount - float(num)
+                    print(amount)
+                    self.pg.execute("UPDATE account SET balance = balance + (%s::NUMERIC)::MONEY WHERE a_id = %s",\
+                    (amount, self.transData[self.rows[0].row()][1],))
+
+                # 检测时间格式
+                time = timeLine.text()
+                time = datetime.datetime.strptime(time, "%Y-%m-%d %H:%M:%S")
+
+                # 把 meta 取回来
+                self.pg.execute("SELECT meta FROM transaction WHERE t_id = %s", (self.transData[self.rows[0].row()][0],))
+                meta = self.pg.fetchall()[0][0]
+                meta = json.dumps(meta)
+
+                # 修改描述
+                meta = json.loads(meta)
+                meta["description"] = descriptionLine.text()
+                meta = json.dumps(meta)
+
+
+                # 修改数据, 使用JSONB
+                self.pg.execute("UPDATE transaction SET time = %s, amount = %s, meta = %s WHERE t_id = %s",\
+                (time, amountLine.text(), meta, self.transData[self.rows[0].row()][0],))
+
+                # 刷新表格
+                self.selected()
+
+            except Exception as e:
+                print(e)
+                QMessageBox.critical(self, 'Error', str(e))
+        else:
+            return
+
+
+
+
+            
+        
+
+
+