diff --git a/m133/modules/skparagraph/src/Run.cpp b/m133/modules/skparagraph/src/Run.cpp
index 61578607c0acbcba7568f5eae06cccd6cc9867df..ca43f18c984fd86037321dd778444d2a144f1df9 100644
--- a/m133/modules/skparagraph/src/Run.cpp
+++ b/m133/modules/skparagraph/src/Run.cpp
@@ -581,22 +581,55 @@ SkScalar Run::addSpacesEvenly(SkScalar space) {
 }
 
 #ifdef ENABLE_TEXT_ENHANCE
+// SkScalar Run::addSpacesEvenly(SkScalar space, Cluster* cluster) {
+//     // Offset all the glyphs in the cluster
+//     SkScalar shift = 0;
+//     for (size_t i = cluster->startPos(); i < cluster->endPos(); ++i) {
+//         fPositions[i].fX += shift;
+//         fHalfLetterspacings[i] = space / PARAM_TWO;
+//         shift += space;
+//     }
+//     if (this->size() == cluster->endPos()) {
+//         // To make calculations easier
+//         fPositions[cluster->endPos()].fX += shift;
+//         fHalfLetterspacings[cluster->endPos()] = space / PARAM_TWO;
+//     }
+//     // Increment the run width
+//     fAdvance.fX += shift;
+//     // Increment the cluster width
+//     cluster->space(shift);
+//     cluster->setHalfLetterSpacing(space / PARAM_TWO);
+
+//     return shift;
+// }
 SkScalar Run::addSpacesEvenly(SkScalar space, Cluster* cluster) {
-    // Offset all the glyphs in the cluster
+    if (cluster->startPos() == cluster->endPos()) {
+        return 0;  // 空 Cluster，不处理
+    }
+
     SkScalar shift = 0;
-    for (size_t i = cluster->startPos(); i < cluster->endPos(); ++i) {
+    const size_t start = cluster->startPos();
+    const size_t end = cluster->endPos();
+
+    // 第一个字符不偏移（保持原位）
+    fHalfLetterspacings[start] = space / PARAM_TWO;
+
+    // 从第二个字符开始，每个字符增加 letterSpacing 的偏移
+    for (size_t i = start + 1; i < end; ++i) {
+        shift += space;
         fPositions[i].fX += shift;
         fHalfLetterspacings[i] = space / PARAM_TWO;
-        shift += space;
     }
-    if (this->size() == cluster->endPos()) {
-        // To make calculations easier
-        fPositions[cluster->endPos()].fX += shift;
-        fHalfLetterspacings[cluster->endPos()] = space / PARAM_TWO;
+
+    // 处理最后一个字符之后的位置（如果有）
+    if (end == this->size()) {
+        shift += space;
+        fPositions[end].fX += shift;
+        fHalfLetterspacings[end] = space / PARAM_TWO;
     }
-    // Increment the run width
+
+    // 更新 Run 和 Cluster 的宽度
     fAdvance.fX += shift;
-    // Increment the cluster width
     cluster->space(shift);
     cluster->setHalfLetterSpacing(space / PARAM_TWO);