diff --git a/sec-beidou/src/main/java/com/imdroid/beidou/controller/APIController.java b/sec-beidou/src/main/java/com/imdroid/beidou/controller/APIController.java
index e2bc371e..837377e9 100644
--- a/sec-beidou/src/main/java/com/imdroid/beidou/controller/APIController.java
+++ b/sec-beidou/src/main/java/com/imdroid/beidou/controller/APIController.java
@@ -195,20 +195,16 @@ public class APIController extends BasicController{
         msgMapper.insert(gnssMsg);
     }
 
-    void updateICCID(GnssDevice device,String dtuAck){
-
-        if(!dtuAck.contains("2B49434349443A")){
-            // “2B49434349443A” 是“ +ICCID: ”的十六进制数据串
-            // 如果部署 ICCID 的信息，那么就不要做下面的处理
+    void updateICCID(GnssDevice device, String dtuAck) {
+        // 只检查 "ICCID:" 的十六进制部分
+        if(!dtuAck.contains("49434349443a")){
             return;
         }
-        System.out.println("APIController:"+dtuAck);
         String content = HexUtil.HexString2String(dtuAck);
         if(content.contains("+ICCID:")){
             System.out.println(content);
             String iccid = content.substring(content.indexOf("+ICCID:") + 8).trim();
             iccid = iccid.split("\r\n")[0].trim();
-            // 更新设备的ICCID
             device.setIccid(iccid);
             deviceMapper.updateById(device);
         }