diff --git a/app/src/main/res/drawable/bg_homework_num_left.xml b/app/src/main/res/drawable/bg_homework_num_left.xml
new file mode 100644
index 0000000..497742e
--- /dev/null
+++ b/app/src/main/res/drawable/bg_homework_num_left.xml
@@ -0,0 +1,6 @@
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <corners android:topLeftRadius="5dp"
+        android:bottomRightRadius="5dp"/>
+    <solid android:color="#489AFA" />
+</shape>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_topic_detail.xml b/app/src/main/res/layout/activity_topic_detail.xml
index 416b261..414d232 100644
--- a/app/src/main/res/layout/activity_topic_detail.xml
+++ b/app/src/main/res/layout/activity_topic_detail.xml
@@ -57,8 +57,8 @@
                     tools:text="题目8"
                     android:layout_width="40dp"
                     android:layout_height="16dp"
-                    android:layout_gravity="end"
-                    android:background="@drawable/bg_homework_num"
+                    android:layout_gravity="start"
+                    android:background="@drawable/bg_homework_num_left"
                     android:gravity="center"
                     android:textColor="@color/white"
                     android:textSize="9sp" />
diff --git a/app/src/main/res/layout/item_homework_eval.xml b/app/src/main/res/layout/item_homework_eval.xml
index 3773431..7e7c813 100644
--- a/app/src/main/res/layout/item_homework_eval.xml
+++ b/app/src/main/res/layout/item_homework_eval.xml
@@ -26,8 +26,8 @@
             tools:text="题目8"
             android:layout_width="40dp"
             android:layout_height="16dp"
-            android:layout_gravity="end"
-            android:background="@drawable/bg_homework_num"
+            android:layout_gravity="start"
+            android:background="@drawable/bg_homework_num_left"
             android:gravity="center"
             android:textColor="@color/white"
             android:textSize="9sp" />