diff --git a/contribute/OpenHarmony-JavaScript-coding-style-guide.md b/contribute/OpenHarmony-JavaScript-coding-style-guide.md
index 32ee51d4ca0e942c14b38945fa38e5c084dcb990..51cb53c6312b463bfc9884756cc4f33a301a3785 100755
--- a/contribute/OpenHarmony-JavaScript-coding-style-guide.md
+++ b/contribute/OpenHarmony-JavaScript-coding-style-guide.md
@@ -751,7 +751,7 @@ for (let number in numbers) {
 ```javascript
 let numbers = [1, 2, 3, 4];
 let sum = 0;
-for (let number in numbers) {
+for (let number of numbers) {
   sum += number;
 }
 // sum === 10