diff --git a/src/utils/heading-numbering.typ b/src/utils/heading-numbering.typ
index 9c64f98..52c1323 100644
--- a/src/utils/heading-numbering.typ
+++ b/src/utils/heading-numbering.typ
@@ -89,11 +89,13 @@
         heading-numbering.hanging-indent = measure(it-number-full).width
       }
       show: par.with(
-        first-line-indent: heading-numbering.first-line-indent,
-        hanging-indent: heading-numbering.hanging-indent
+        first-line-indent: (amount: heading-numbering.first-line-indent, all: true),
+        hanging-indent: heading-numbering.hanging-indent,
       )
       if it-number == none {
         it.body
+      } else if heading-numbering.hanging-indent.to-absolute() < heading-numbering.first-line-indent.to-absolute() {
+        it-number-full + it.body
       } else {
         box(width: heading-numbering.hanging-indent, it-number-full) + it.body
       }
diff --git a/tests/heading-numbering/ref/8.png b/tests/heading-numbering/ref/8.png
new file mode 100644
index 0000000..e5f0c38
Binary files /dev/null and b/tests/heading-numbering/ref/8.png differ
diff --git a/tests/heading-numbering/test.typ b/tests/heading-numbering/test.typ
index c8454e1..e82c260 100644
--- a/tests/heading-numbering/test.typ
+++ b/tests/heading-numbering/test.typ
@@ -123,3 +123,27 @@
 
   #test-content
 ]
+
+#testcase[
+  #let (theme, (song, hei, kai, fang)) = ctyp(
+    heading-numbering: ((
+      format: "一",
+      sep: 1em,
+    ), (
+      format: "1.1",
+      sep: " ",
+      first-line-indent: 22pt,
+      hanging-indent: 0em
+    ), (
+      format: "1.1",
+      sep: " ",
+      first-line-indent: 2em,
+      hanging-indent: 4em
+    ))
+  )
+  #show: theme
+
+  = 中文编号格式示例
+
+  #test-content
+]