diff --git a/src/components/AdminPage/Wristband/LocStatus/index.js b/src/components/AdminPage/Wristband/LocStatus/index.js
index b7a01d1..03fa382 100644
--- a/src/components/AdminPage/Wristband/LocStatus/index.js
+++ b/src/components/AdminPage/Wristband/LocStatus/index.js
@@ -89,6 +89,7 @@ class LocStatus extends React.Component{
 
     render (){
         let {i18n} = this.props;
+        console.log(this.state.list);
         return (
             <Container fluid>
                 <Segment className="clearfix">
diff --git a/src/tools/index.js b/src/tools/index.js
index 56aaca0..ef7ee9f 100644
--- a/src/tools/index.js
+++ b/src/tools/index.js
@@ -7,11 +7,12 @@
  * @return {string}
  */
 export const padding = (str, lng = 0, arrow = -1, txt = '0') => {
-	if(typeof str != 'string') str = str.toString();
-	if(typeof txt != 'string') txt = txt.toString();
-	if(!isFinite(lng) || lng <= 0) return str;
-	if(str.length < lng) return padding(arrow < 0 ? `${txt}${str}` : `${str}${txt}`, lng, arrow, txt);
-	return str;
+    if (!str) str = '';
+    if (typeof str != 'string') str = str.toString();
+    if (typeof txt != 'string') txt = txt.toString();
+    if (!isFinite(lng) || lng <= 0) return str;
+    if (str.length < lng) return padding(arrow < 0 ? `${txt}${str}` : `${str}${txt}`, lng, arrow, txt);
+    return str;
 }
 
 /**
@@ -21,7 +22,7 @@ export const padding = (str, lng = 0, arrow = -1, txt = '0') => {
  * @return {string}
  */
 export const convertTime = (timestamp, showSec = false) => {
-	timestamp = padding(timestamp, 13, 1, '0');
-	let d = new Date(parseInt(timestamp));
-	return `${d.getFullYear()}-${padding(d.getMonth() + 1, 2)}-${padding(d.getDate(), 2)} ${padding(d.getHours(), 2)}:${padding(d.getMinutes(), 2)}${showSec ? `:${padding(d.getSeconds(), 2)}` : ''}`
+        timestamp = padding(timestamp, 13, 1, '0');
+        let d = new Date(parseInt(timestamp));
+        return `${d.getFullYear()}-${padding(d.getMonth() + 1, 2)}-${padding(d.getDate(), 2)} ${padding(d.getHours(), 2)}:${padding(d.getMinutes(), 2)}${showSec ? `:${padding(d.getSeconds(), 2)}` : ''}`
 }
\ No newline at end of file