diff --git a/docs/uni-app-x/css/letter-spacing.md b/docs/uni-app-x/css/letter-spacing.md
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+## letter-spacing
+
+
+<!-- CSSJSON.letter-spacing.description -->
+
+<!-- CSSJSON.letter-spacing.syntax -->
+
+<!-- CSSJSON.letter-spacing.values -->
+
+<!-- CSSJSON.letter-spacing.compatibility -->
+
+<!-- CSSJSON.letter-spacing.reference -->
\ No newline at end of file