diff --git a/app/src/main/res/layout/bottom_sheet_todo.xml b/app/src/main/res/layout/bottom_sheet_todo.xml
index 823f585..a8beac0 100644
--- a/app/src/main/res/layout/bottom_sheet_todo.xml
+++ b/app/src/main/res/layout/bottom_sheet_todo.xml
@@ -102,6 +102,13 @@
                     android:layout_height="wrap_content"
                     android:text="@string/subject_physics" />
 
+                <com.google.android.material.chip.Chip
+                    android:id="@+id/subject_chemistry"
+                    style="@style/Widget.Material3.Chip.Filter"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/subject_chemistry" />
+
                 <com.google.android.material.chip.Chip
                     android:id="@+id/subject_history"
                     style="@style/Widget.Material3.Chip.Filter"
diff --git a/app/src/main/res/values-zh-rCN/strings.xml b/app/src/main/res/values-zh-rCN/strings.xml
index 2fe0693..d607b41 100644
--- a/app/src/main/res/values-zh-rCN/strings.xml
+++ b/app/src/main/res/values-zh-rCN/strings.xml
@@ -17,6 +17,7 @@
     <string name="subject_english">英语</string>
     <string name="subject_biology">生物</string>
     <string name="subject_physics">物理</string>
+    <string name="subject_chemistry">化学</string>
     <string name="subject_history">历史</string>
     <string name="subject_geography">地理</string>
     <string name="subject_law">道法</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index eae2cba..896399f 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -17,6 +17,7 @@
     <string name="subject_english">English</string>
     <string name="subject_biology">Biology</string>
     <string name="subject_physics">Physics</string>
+    <string name="subject_chemistry">Chemistry</string>
     <string name="subject_history">History</string>
     <string name="subject_geography">Geography</string>
     <string name="subject_law">Law</string>