diff --git a/static/js/app.js b/static/js/app.js
index 3a360ab..4985cf9 100644
--- a/static/js/app.js
+++ b/static/js/app.js
@@ -813,7 +813,8 @@ function openNotes(bookId, title, author, cover) {
             if (data.review_count > 0) {
                 html += `<div class="notes-section-title">💭 想法/点评 (${data.review_count})</div>`;
                 data.reviews.forEach((r) => {
-                    const stars = r.star > 0 ? `<span class="review-star">${"★".repeat(r.star)}${"☆".repeat(5 - r.star)}</span>` : "";
+                    const starVal = Math.max(0, Math.min(5, parseInt(r.star) || 0));
+                    const stars = starVal > 0 ? `<span class="review-star">${"★".repeat(starVal)}${"☆".repeat(5 - starVal)}</span>` : "";
                     html += `
                         <div class="review-item">
                             ${escapeHtml(r.content)}