diff --git a/README.md b/README.md
index ca8aa13..9ea0979 100644
--- a/README.md
+++ b/README.md
@@ -71,14 +71,14 @@ total: <files_changed> files, +<additions>, -<deletions>
 ## Review 1 (<review-state>)
 > <reviewer>
 
-### Comment 1.1
+### Comment <pr-index>.<comment-seq>
 <file>:<line>
 <user>:
 ```md
 <原始评论正文>
 ```
 
-### Reply 1.1.1
+### Reply <pr-index>.<comment-seq>.<reply-seq>
 <user>:
 ```md
 <原始回复正文>
diff --git a/src/render/markdown.rs b/src/render/markdown.rs
index a118026..07c9849 100644
--- a/src/render/markdown.rs
+++ b/src/render/markdown.rs
@@ -22,9 +22,10 @@ fn render_body(body: &str) -> String {
     format!("{fence}md\n{body}\n{fence}\n")
 }
 
-fn render_thread(thread_index: usize, thread: &CommentThread) -> String {
+fn render_thread(pr_index: i64, comment_seq: usize, thread: &CommentThread) -> String {
     let mut out = String::new();
-    out.push_str(&format!("### Comment {}.1\n", thread_index));
+    let comment_number = format!("{pr_index}.{comment_seq}");
+    out.push_str(&format!("### Comment {comment_number}\n"));
     if let Some(file_path) = &thread.file_path {
         if let Some(line) = thread.line {
             out.push_str(&format!("{file_path}:{line}\n"));
@@ -36,7 +37,7 @@ fn render_thread(thread_index: usize, thread: &CommentThread) -> String {
     out.push_str(&render_body(&thread.root_comment.body));
 
     for (reply_index, reply) in thread.replies.iter().enumerate() {
-        let reply_number = format!("{thread_index}.1.{}", reply_index + 1);
+        let reply_number = format!("{comment_number}.{}", reply_index + 1);
         out.push_str(&format!("\n### Reply {reply_number}\n"));
         out.push_str(&format!("{}:\n", reply.user));
         out.push_str(&render_body(&reply.body));
@@ -101,7 +102,7 @@ pub fn render_markdown(doc: &PrReviewDocument) -> String {
     }
 
     for (thread_index, thread) in doc.threads.iter().enumerate() {
-        out.push_str(&render_thread(thread_index + 1, thread));
+        out.push_str(&render_thread(doc.meta.pr_index, thread_index + 1, thread));
         out.push('\n');
     }
 
diff --git a/tests/render_markdown_tests.rs b/tests/render_markdown_tests.rs
index 3c265fe..354fb96 100644
--- a/tests/render_markdown_tests.rs
+++ b/tests/render_markdown_tests.rs
@@ -68,8 +68,8 @@ fn render_markdown_includes_expected_sections_and_preserves_comment_markdown() {
     assert!(md.contains("## Commits"));
     assert!(md.contains("## Diff Stat"));
     assert!(md.contains("## Review 1 (COMMENT)"));
-    assert!(md.contains("### Comment 1.1"));
-    assert!(md.contains("### Reply 1.1"));
+    assert!(md.contains("### Comment 7.1"));
+    assert!(md.contains("### Reply 7.1.1"));
     assert!(md.contains("````md"));
     assert!(md.contains("```rs\nlet x = 1;\n```"));
     assert!(md.contains("looks good"));