diff --git a/lib/zin/wg/think3c/js/v1.js b/lib/zin/wg/think3c/js/v1.js
index a76030aeb2..6652c32b01 100644
--- a/lib/zin/wg/think3c/js/v1.js
+++ b/lib/zin/wg/think3c/js/v1.js
@@ -227,7 +227,14 @@ function colorRegions(binaryImageData)
     });
 }
 
-
+/**
+ * 展示着色的图像。
+ * Display colored image.
+ *
+ * @param  string coloredImageData
+ * @access public
+ * @return void
+ */
 function displayColoredImage(coloredImageData)
 {
     const canvas = $('#canvas')[0];